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Sample records for bridge deck pavement

  1. OKLAHOMA DEPARTMENT OF TRANSPORTATION PAVEMENT AND BRIDGE DECK SMOOTHNESS REQUIREMENTS

    E-print Network

    OKLAHOMA DEPARTMENT OF TRANSPORTATION SUMMARY OF PAVEMENT AND BRIDGE DECK SMOOTHNESS REQUIREMENTS In ODOT's 2009 Standard Specification for Highway Construction, General Requirements for Surfaces Section under construction methods, a smoothness tolerance of 1/8 inch per 10 feet using a 10 foot straight edge

  2. Research on tensile strength characteristics of bridge deck pavement bonding layers

    NASA Astrophysics Data System (ADS)

    Wu, Shaopeng; Han, Jun

    2009-12-01

    As the development of the traffic in the world, the bridge deck pavement is playing a more and more important role in the whole traffic system. Big span bridge has become more and more especially cement concrete bridge, therefore the bridge deck pavement bonding layers are emphasized as an important part of bridge traffic system, which can mitigate travel impact to bridge and magnify stationary or traffic amenity. The quality and durability of deck pavement bonding layer has directly effect on traffic safety, comfort, durability and investment of bridge. It represents the first line of defence against the ingress of water, road de-icing salts and aggressive chemicals. In real project, many early age damage of bridge deck pavement has become serious disease that affecting the function of bridge. During the construction of the bridge deck, many types of asphalt binders were used, such as styrene-butadiene-styrene (SBS) modified asphalt, styrene-butadiene rubber (SBR) modified asphalt, neoprene latex asphalt, etc. In this paper UTM-25 was used to test the tensile strength of different bridge deck pavement bonding layers with the different treatment methods to inter-surface.

  3. Research on tensile strength characteristics of bridge deck pavement bonding layers

    NASA Astrophysics Data System (ADS)

    Wu, Shaopeng; Han, Jun

    2010-03-01

    As the development of the traffic in the world, the bridge deck pavement is playing a more and more important role in the whole traffic system. Big span bridge has become more and more especially cement concrete bridge, therefore the bridge deck pavement bonding layers are emphasized as an important part of bridge traffic system, which can mitigate travel impact to bridge and magnify stationary or traffic amenity. The quality and durability of deck pavement bonding layer has directly effect on traffic safety, comfort, durability and investment of bridge. It represents the first line of defence against the ingress of water, road de-icing salts and aggressive chemicals. In real project, many early age damage of bridge deck pavement has become serious disease that affecting the function of bridge. During the construction of the bridge deck, many types of asphalt binders were used, such as styrene-butadiene-styrene (SBS) modified asphalt, styrene-butadiene rubber (SBR) modified asphalt, neoprene latex asphalt, etc. In this paper UTM-25 was used to test the tensile strength of different bridge deck pavement bonding layers with the different treatment methods to inter-surface.

  4. Plans: Poop Deck, Boat Deck, Housetop, Bridge Deck, Upper Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Plans: Poop Deck, Boat Deck, Housetop, Bridge Deck, Upper Bridge Deck, Navigating Bridge, Forecastle Deck, Upper Deck, Second Deck and Hold - Saugatuck, James River Reserve Fleet, Newport News, Newport News, VA

  5. MODELING OF HYDRONIC AND ELECTRIC-CABLE SNOW-MELTING SYSTEMS FOR PAVEMENTS

    E-print Network

    MODELING OF HYDRONIC AND ELECTRIC-CABLE SNOW-MELTING SYSTEMS FOR PAVEMENTS AND BRIDGE DECKS By XIA FOR PAVEMENTS AND BRIDGE DECKS Thesis Approved: _______________________________________________ Thesis Advisor

  6. Dog Bridge, view of the deck of the bridge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Dog Bridge, view of the deck of the bridge and rails looking from Linden Lane - National Park Seminary, Bounded by Capitol Beltway (I-495), Linden Lane, Woodstove Avenue, & Smith Drive, Silver Spring, Montgomery County, MD

  7. DEVELOPMENT OF FRP BRIDGE DECKS AN ANALYTICAL INVESTIGATION -

    E-print Network

    . Experimental studies on the modular all-fiberglass reinforced plastic FRP bridge deck produced encouraging. Analytical and experimental study programs on modular all-Fiberglass Reinforced Plastic (FRP) Bridge deck

  8. Embedded fiber optic sensors for bridge deck chloride penetration measurements

    NASA Astrophysics Data System (ADS)

    Fuhr, Peter L.; Huston, Dryver R.; MacCraith, Brian D.

    1998-04-01

    The use of chloride-based deicing agents to help clear U.S. highways of roadway hazards leads to associated chemical related problems. Fouling of local rivers and streams due to runoff of the waterborne chlorides is significant and has contributed to local ordinances that are attempting to force state agencies to reduce, if not eliminate, the use of these chlorides (typically at the cost of increased driving hazards). With respect to the corrosion aspects of chloride application, cracks that occur in the roadway/bridge pavement allow water to seep into the pavement carrying the chloride to the rebar with the resultant increase in corrosion. The costs of this corrosion are considerable and have led to the wide- spread use of chloride/water impermeable membranes on roadways and especially within bridges. Fiber optics sensors have repeatedly been shown to provide measurement capabilities of parameters within such reinforced concrete structures. Development of fiber optic chloride sensors capable of being embedded within a roadway or bridge deck is reported.

  9. BEHAVIOUR OF CONCRETE BRIDGE DECK MODEL REINFORCED BY CARBON FRP

    E-print Network

    the construction ofthe bridge. testing of six pretensioned concrete beams of 1:3.6 scale model of the bridgeBEHAVIOUR OF CONCRETE BRIDGE DECK MODEL REINFORCED BY CARBON FRP Amr Abdelrahman, Tarek Hassan model of a bridge deck slab reinforced by carbon fibre reinforced polymers, CFRP reinforcement

  10. OVERALL BEHAVIOR AND MATERIAL CHARACTERIZATION OF PULTRUDED GFRP BRIDGE DECKS

    E-print Network

    needs for rehabilitation of existing bridges and construction of new bridges. FRP bridge decks have onlyOVERALL BEHAVIOR AND MATERIAL CHARACTERIZATION OF PULTRUDED GFRP BRIDGE DECKS Lee Nelson1 , Tarek K. Hassan2 and Sami H. Rizkalla3 Fellow, ASCE 1 Graduate Student, Department of Civil, Construction

  11. Cracking behavior of structural slab bridge decks

    NASA Astrophysics Data System (ADS)

    Baah, Prince

    Bridge deck cracking is a common problem throughout the United States, and it affects the durability and service life of concrete bridges. Several departments of transportation (DOTs) in the United States prefer using continuous three-span solid structural slab bridges without stringers over typical four-lane highways. Recent inspections of such bridges in Ohio revealed cracks as wide as 0.125 in. These measured crack widths are more than ten times the maximum limit recommended in ACI 224R-01 for bridge decks exposed to de-icing salts. Measurements using digital image correlation revealed that the cracks widened under truck loading, and in some cases, the cracks did not fully close after unloading. This dissertation includes details of an experimental investigation of the cracking behavior of structural concrete. Prism tests revealed that the concrete with epoxy-coated bars (ECB) develops the first crack at smaller loads, and develops larger crack widths compared to the corresponding specimens with uncoated (black) bars. Slab tests revealed that the slabs with longitudinal ECB developed first crack at smaller loads, exhibited wider cracks and a larger number of cracks, and failed at smaller ultimate loads compared to the corresponding test slabs with black bars. To develop a preventive measure, slabs with basalt and polypropylene fiber reinforced concrete were also included in the test program. These test slabs exhibited higher cracking loads, smaller crack widths, and higher ultimate loads at failure compared to the corresponding slab specimens without fibers. Merely satisfying the reinforcement spacing requirements given in AASHTO or ACI 318-11 is not adequate to limit cracking below the ACI 224R-01 recommended maximum limit, even though all the relevant design requirements are otherwise met. Addition of fiber to concrete without changing any steel reinforcing details is expected to reduce the severity and extent of cracking in reinforced concrete bridge decks.

  12. 11. DETAIL VIEW OF BRIDGE DECK, SHOWING ENDPANEL VERTICAL, ARCH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. DETAIL VIEW OF BRIDGE DECK, SHOWING END-PANEL VERTICAL, ARCH SEGMENT, LOWER CHORD AND FLOOR SYSTEM, LOOKING NORTHEAST - Davis Bridge, Spanning Upper Iowa River at County Road 16, Lime Springs, Howard County, IA

  13. 10. AN IMAGE, LOOKING DUE NORTH OF THE BRIDGE DECK, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. AN IMAGE, LOOKING DUE NORTH OF THE BRIDGE DECK, SHOWING LAYERS OF GRAVEL, ASPHALT AND TIMBER. - Wells County Bridge No. 74, Spanning Rock Creek Ditch at County Road 400, Bluffton, Wells County, IN

  14. 8. Detail of underside of bridge deck, from the southern ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Detail of underside of bridge deck, from the southern end looking toward north-northwest. - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

  15. 6. An elevated view of the bridge deck looking east ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. An elevated view of the bridge deck looking east toward Battelle Laboratories and the Ohio State University. Picture taken from State Route 315. - King Avenue Bridge, Spanning Olentangy River, Columbus, Franklin County, OH

  16. Issues in bridge deck damage evaluation using aerial photos

    NASA Astrophysics Data System (ADS)

    Natarajan, M.; Chen, S. E.; Boyle, C.; Martin, E.; Hauser, E.

    2012-04-01

    Small format aerial photography (SFAP) with low flying technique is proposed for damage evaluation of bridge decks. High resolution images obtained using under-belly photography can be used to quantify the various bridge deck problems. The conventional truck-mount or vehicle-mount deck imaging technologies require a large number of image samples. Hence the physical scanning is time consuming and it is also challenging consider the size and location of a bridge. Aerial imaging overcomes these issues, but they face different kinds of challenges that are posed by obstacles such as shadow from trees, power lines and vehicles, signs and luminaries structures. The image resolution uncertainty, which is a function of the pilot skills and flying conditions, may also add additional challenges to aerial imaging technique. Hence different image processing tools have to be integrated into a single package to achieve the desired task. This paper summarizes the challenges faced and the preliminary results are presented and discussed.

  17. Bridge deck joints evaluation using lidar and aerial photography

    NASA Astrophysics Data System (ADS)

    Bian, Haitao; Chen, Shen-En; Watson, Christopher; Hauser, Edd

    2011-04-01

    Deck joint is important for a bridge - Any cost-effective evaluation methods that can help trace joint movements during frequent inspections will provide valuable data to bridge engineers. In this paper, 3D Terrestrial LiDAR and Aerial photography are being investigated as possible joint evaluation methods. The laser scanners record 3D positions of the surface points, generating high density point clouds. Aerial images taken by commercial DSLR cameras in a small airplane flying at 1000 feet, generates high resolution imagery. Both techniques have sub-inch pixel resolutions. Scanning results from bridges in both Florida and Alabama have shown that LiDAR and aerial imaging technologies are compatible techniques and can be applied in bridge deck joint performance evaluation. Moreover, both techniques have the potential to reduce the costs in bridge inspection.

  18. Evaluation of Multiple Corrosion Protection Systems for Reinforced Concrete Bridge Decks

    E-print Network

    Draper, Jason Leigh

    2009-12-09

    Chloride-induced corrosion is one of the leading causes of premature serviceability failure in reinforced concrete bridge decks. In an effort to mitigate the effect of corrosion on the longevity of concrete bridge decks, several corrosion protection...

  19. Deck plate girder spans and steel piers of Bridge No. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Deck plate girder spans and steel piers of Bridge No. 1396, Fourth Potomac and Second B&O Crossing, over original B&O right of way (right) and flood plain (left), looking west. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  20. Concrete bridge deck early problem detection and mitigation using robotics

    NASA Astrophysics Data System (ADS)

    Gucunski, Nenad; Yi, Jingang; Basily, Basily; Duong, Trung; Kim, Jinyoung; Balaguru, Perumalsamy; Parvardeh, Hooman; Maher, Ali; Najm, Husam

    2015-04-01

    More economical management of bridges can be achieved through early problem detection and mitigation. The paper describes development and implementation of two fully automated (robotic) systems for nondestructive evaluation (NDE) and minimally invasive rehabilitation of concrete bridge decks. The NDE system named RABIT was developed with the support from Federal Highway Administration (FHWA). It implements multiple NDE technologies, namely: electrical resistivity (ER), impact echo (IE), ground-penetrating radar (GPR), and ultrasonic surface waves (USW). In addition, the system utilizes advanced vision to substitute traditional visual inspection. The RABIT system collects data at significantly higher speeds than it is done using traditional NDE equipment. The associated platform for the enhanced interpretation of condition assessment in concrete bridge decks utilizes data integration, fusion, and deterioration and defect visualization. The interpretation and visualization platform specifically addresses data integration and fusion from the four NDE technologies. The data visualization platform facilitates an intuitive presentation of the main deterioration due to: corrosion, delamination, and concrete degradation, by integrating NDE survey results and high resolution deck surface imaging. The rehabilitation robotic system was developed with the support from National Institute of Standards and Technology-Technology Innovation Program (NIST-TIP). The system utilizes advanced robotics and novel materials to repair problems in concrete decks, primarily early stage delamination and internal cracking, using a minimally invasive approach. Since both systems use global positioning systems for navigation, some of the current efforts concentrate on their coordination for the most effective joint evaluation and rehabilitation.

  1. Charleson et al. BEllAVIOUR OF A MODEL CONCRETE BRIDGE DECK

    E-print Network

    into the bridge. Prior to the construction, a full scale model of a portion of the bridge deck was builtCharleson et al. BEllAVIOUR OF A MODEL CONCRETE BRIDGE DECK · REINFORCED BY CFRP Kenneth CHARLESON will be the site of the first bridge in Canada to incorporate carbon fibre reinforced polymer (CFRP) reinforcement

  2. Vertical impedance measurements on concrete bridge decks for assessing susceptibility of reinforcing steel to corrosion

    NASA Astrophysics Data System (ADS)

    Bartholomew, Paul D.; Guthrie, W. Spencer; Mazzeo, Brian A.

    2012-08-01

    Corrosion is a pressing problem for aging concrete infrastructure, especially bridge decks. Because of its sensitivity to factors that affect corrosion of reinforcing steel in concrete, resistivity is an important structural health indicator for reinforced concrete structures. In this research, an instrument was developed to measure vertical impedance on concrete bridge decks. Measurements of vertical impedance on slabs prepared in the laboratory, on slabs removed from decommissioned bridge decks, and on an in-service bridge deck in the field demonstrate the utility of the new apparatus.

  3. Thermal infrared inspection of FRP bridge decks for health monitoring

    NASA Astrophysics Data System (ADS)

    Miceli, Marybeth; Duke, John C.; Horne, Michael

    2003-04-01

    Even in the best of economic times, funding for infrastructure maintenance, repair and rehabilitation is never adequate. As infrastructure in the United States continues to age, the funding deficit to simply maintain the existing bridges will continue to soar. Due to the inadequacy of capital allocated for infrastructure repair and rehabilitation, new, more durable construction materials with potentially longer service lives are being explored as a means of narrowing the financial deficit. One such material is fiber reinforced polymer matrix composites (FRP). By replacing conventional bridge component structural materials (i.e.; reinforced concrete and steel) with FRP, which has a higher strength to weight ratio, bridges can achieve a significant reduction in dead load weight. Bridges that have experienced substructure and superstructure deterioration can undergo a superstructure replacement with FRP rather than be subjected to the traditional load posting (vehicular load restrictions). Through reducing the bridge dead load without compromising bridge strength, original design live loads can be maintained. In order for these new bridge superstructure components to be readily accepted as viable construction materials, quick and effective means of monitoring them for degradation and overall structural health must be established and standardized. One of the most promising methods of achieving this is through the use of thermal infrared (TIR). A slight increase in temperature above ambient will allow for adequate inspection of large sections of bridge decking for detection of debonded areas between FRP components. This paper illustrates the successes and challenges of using TIR for this purpose, both in the laboratory and in field investigations. Areas for future work and improvements will be suggested.

  4. 10. DETAIL VIEW OF BRIDGE DECK, SHOWING TYPICAL VERTICAL/OUTRIDER, ARCH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL VIEW OF BRIDGE DECK, SHOWING TYPICAL VERTICAL/OUTRIDER, ARCH SEGMENT AND DIAGONALS, LOOKING NORTH - Davis Bridge, Spanning Upper Iowa River at County Road 16, Lime Springs, Howard County, IA

  5. Torsional stiffness degradation and aerostatic divergence of suspension bridge decks

    NASA Astrophysics Data System (ADS)

    Zhang, Z. T.; Ge, Y. J.; Yang, Y. X.

    2013-07-01

    The mechanism of aerostatic torsional divergence (ATD) of long-span suspension bridges is investigated. A theoretical analysis on the basis of a generalized model is presented, showing that the vertical motion of a bridge deck is crucial to the torsional stiffness of the whole suspended system, and that the vertical motion of either cable with a magnitude beyond a certain threshold could result in a sudden degradation of the torsional stiffness of the system. This vertical motion-induced degradation of stiffness is recognized as the main reason for the ATD. Long-span suspension bridges are susceptible to such a type of divergence, especially when they are immersed in turbulent wind fields. The divergences that occur in turbulent wind fields differ significantly from those in smooth wind fields, and the difference is well explained by the generalized model that the loosening of any one cable could result in the vanishing of the part of stiffness provided by the whole cable system. The mechanism revealed in this paper leads to a definition of the critical wind speed of the ATD in a turbulent flow; that is, the one resulting in a vertical motion so large as to loosen either cable to a stressless state. Numerical results from the nonlinear finite-element (FE) analysis of the Xihoumen suspension bridge, in conjunction with observations from wind tunnel tests on an aero-elastic full bridge model, are in support of the viewpoint presented in this study.

  6. BEHAVIOR OF CONCRETE BRIDGE DECKS REINFORCED WITH HIGH-STRENGTH AND HIGH CORROSION-RESISTANT STEEL

    E-print Network

    BEHAVIOR OF CONCRETE BRIDGE DECKS REINFORCED WITH HIGH- STRENGTH AND HIGH CORROSION-RESISTANT STEEL, high corrosion-resistant steel commercially known as Micro-composite Multi-structural Formable (MMFX) steel. The study included testing three full-scale bridge decks having a span-to-depth ratio of 12

  7. NISTIR 7841 Study of Early-Age Bridge Deck Cracking in Nevada

    E-print Network

    Bentz, Dale P.

    NISTIR 7841 Study of Early-Age Bridge Deck Cracking in Nevada and Wyoming Dale P. Bentz Paul E in Nevada and Wyoming Dale P. Bentz Paul E. Stutzman Aaron R. Sakulich W. Jason Weiss Materials bridge decks were constructed in the Lake Mead National Recreation area in Nevada. Within six months

  8. Simple model of cable-stayed bridge deck subjected to static wind loading

    NASA Astrophysics Data System (ADS)

    Kang, Yi-Lung; Wang, Yang Cheng

    1997-05-01

    Cable-stayed bridges have been known since 18th century with aesthetics design. The structural system and the structural behavior are significantly different from those of continuous bridges. Compared to continuous bridge, cable- stayed bridges have more flexure bridge deck than those of continuous bridges.On the other hand, cable-stayed bridges have less stiffness to resist wind loading especially for lateral loads. The first considering of bridge engineering is safety. In 1940's, Tacoma Narrows Suspension Bridge destroyed by wind loading is a good example even though it is not a cable-stayed bridge. After the bridge was destroyed, a lot of research articles have been published regarding cable supported bridge subjected to wind loading. In recent days, high strength materials have been served. The bridge engineers use the advantages to expand the span length of cable-stayed bridges. Due to the span length increased and the use of high strength materials, cable- stayed bridges have more significant nonlinear behavior subjected to wind loading. In this paper, a slice bridge deck of cable-stayed bridge connected to internal support cables is considered. The deck has been considered to be subjected to lateral static wind loading. Since cables can not take compressive force, the deck has strongly nonlinear behavior even though the materials are linear elastic. Several primary load combinations have ben considered in this paper such as the bridge deck supposed to be moved horizontally without rotation or the bridge deck supposed to be moved horizontally with rotational deformation. The mathematical formulas and the numerical solutions are found and represented in graphical forms. The results can be provided to bridge designers and researchers for further study of this type of structure subjected to wind loading.

  9. Liu, Rees and Spitler. 1 Simulation of a Geothermal Bridge Deck Anti-icing System and Experimental Validation

    E-print Network

    of salt/sand to bridge decks is less successful than application to the adjacent highway due to increased corrosion rates induced by the application of salt. The heating of bridge decks has been proposed improved road safety and increased bridge deck life. A number of heat sources have been proposed

  10. Fatigue Life of Damaged Bridge Deck Panels Strengthened With Carbon Fiber Hongseob Oh, Jongsung Sim, and Christian Meyer

    E-print Network

    Meyer, Christian

    1 Fatigue Life of Damaged Bridge Deck Panels Strengthened With Carbon Fiber Sheets Hongseob Oh was applied to test panels, which were then reinforced with carbon fiber sheets (CFS) using two different for bridge decks, based on cumulative damage theory. Keywords: bridge deck slab, carbon fiber sheets, fatigue

  11. BEHAVIOR OF 3-D WOVEN GLASS FIBER REINFORCED POLYMERIC BRIDGE DECK SLABS

    E-print Network

    in the use of fiber reinforced polymers (FRP) as structural elements in bridge construction in the construction of new bridges and retrofitting of existing bridges 2 . Interest in fiber- reinforced polymericSG181F BEHAVIOR OF 3-D WOVEN GLASS FIBER REINFORCED POLYMERIC BRIDGE DECK SLABS T. NORTON, DR. T

  12. Health monitoring of precast bridge deck panels reinforced with glass fiber reinforced polymer bars

    NASA Astrophysics Data System (ADS)

    Ries, James Mcdaniel

    The Beaver Creek Bridge on US highway 6 is the pilot project for Glass Fiber Reinforced Polymer (GFRP) bridge decks and posttensioned bridge decks in the state of Utah. The bridge was built in 2009, using accelerated bridge construction practices, including the use of precast prestressed girders, as well as precast decking. The westbound bridge decking was composed of 12 precast panels each measuring 41'-5" long, 6'-10" wide, and 9¼" thick, and weighing approximately 33 kips. At the time, these panels were the longest GFRP panels in the United States. The Utah Department of Transportation has decided to evaluate GFRP reinforcing bars as an alternative to steel rebar in this bridge deck. The hope is to increase the lifespan of bridge decks to match the service life of the entire bridge. Due to the nature of the GFRP bars, the panels were lifted at four points using straps instead of imbedded anchors. During the four-point lifting, the panels exhibited small deflections and strains; furthermore, no cracks larger than hairline cracks were found in the panels after lifting. The Beaver Creek Bridge deck is the first precast deck in the state of Utah to be posttensioned in the direction of traffic. Posttensioning bridge decks is expected to become the norm in the state of Utah. The posttensioning resulted in increased continuity between panels. In order to quantify the expected performance of the bridge during its service life, a truck load test was performed. The truck load test was comprised of a static and dynamic test. During the truck load test, the bridge experienced deflections in the panels which were 93% below design values. Girder deflections were also small. The use of GFRP bars has the potential to extend the life of bridge decks exposed to deicing salts from 45 years to 100 years, while only requiring an increased capital cost in the bridge of 8%. Furthermore, the use of GFRP bars in conjunction with accelerated building practices has the potential to reduce long-term user delays resulting from maintenance. The difference in capital cost could decrease as designers become more comfortable with the material and gain experience with the system.

  13. FULL SCALE TESTING OF A BRIDGE DECK SLAB REINFORCED WITH CFRP K. Charieson1

    E-print Network

    , 1994. Abdelrahman et al, 1995). Construction is underway in Headingley, Manitoba for the first bridge of 1997. This paper discusses a full scale bridge deck model, constructed and tested at the University of (Rizkalla and Tadros, 1994). Construction is underway for the first bridge in Canada to incorporate carbon

  14. Analytical Study of Vertical and Torsional Free Vibration of Cable Supported Bridge Decks

    NASA Astrophysics Data System (ADS)

    Gorman, Daniel J.

    The superposition method is employed to obtain an analytical type solution for the free vibration of cable supported bridge decks. Each pair of vertical elastic cables is considered to impart a vertical force to the deck by means of a rigid cross-member passing transversely beneath it. Rigid knife-edge support encountered at bridge towers is handled as well. In this introductory study the deck is treated as a thin isotropic plate. Any number of support cable pairs, of any stiffness, may be handled. Inter cross-member distances are referred to as spans. Free vibration eigenvalues and mode shapes are presented for three and four span illustrative cases.

  15. Crack mitigation in concrete bridge decks through experimental analysis and computer modeling

    NASA Astrophysics Data System (ADS)

    Richardson, Douglas M.

    Bridge deck cracking can cause deterioration of bridge decks, leading to a shorter life span and poor performance. Throughout the US, cracking has been identified as a problem, with transverse cracking along the deck at regular spacings being the most prominent type. This problem is usually caused by drying shrinkage within the concrete. The material properties, restraint, and distances without expansion joints all affect the crack pattern within the deck. This study will delve into the reasons that bridge decks crack, the strains that are associated with drying shrinkage, and possible methods for abating its effects. The research is divided into two parts, the first being laboratory experimentation, which was conducted through the use of two 7 ft. x 10 ft. experimental concrete bridge bays. Each bay was instrumented with strain and temperature gages throughout the deck and girders, which collected data for six months. The first deck was poured with a control concrete mix used currently in Illinois. The second deck was poured with a type K expansive concrete, which could battle the effects of shrinkage. For both decks, the results suggest a compressive strain throughout the rebar and along the top surface of the concrete, except for the locations where cracks are found (at these locations the strain slopes upward into tension). The strain in the type K deck, though, was notably less than that in the control deck and the onset of cracking was delayed by three weeks, giving the indication of an improvement over the current mix design. The second portion of the research was focused on using a finite element model to replicate the bridge bay and study the results. Equivalent temperature loading was used to apply the shrinkage loads recorded during the experimental portion of the research. The model was then expanded to encompass a full-scale bridge and in order to provide some insight into shrinkage strain in the real world. The end goal is to help alleviate cracking in current bridge decks, as well as create suggestions for future bridge construction.

  16. 12. ANNISQUAM BRIDGE, LOOKING WEST ALONG DECK, C.1885. Photocopy of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. ANNISQUAM BRIDGE, LOOKING WEST ALONG DECK, C.1885. Photocopy of photograph (original glass plate negative #T14 in the collection of the Annisquam Historical Society, Annisquam, Massachusetts). Photographer: Martha Harvey (1862-1949). - Annisquam Bridge, Spanning Lobster Cove between Washington & River Streets, Gloucester, Essex County, MA

  17. Mohamed, Tarek Said. Fabrication and Behavior of Three-Dimensionally Woven Glass Fiber Reinforced Polymeric Bridge Deck. (Under the direction

    E-print Network

    a textile machine and resin infusion process. The research investigated the mechanical properties of 3-D GFRP including: Tensile properties, compression properties, and flexural properties. Three bridge decks

  18. On the aeroelastic transient behaviour of a streamlined bridge deck section in a wind tunnel

    NASA Astrophysics Data System (ADS)

    Manzoor, S.; Hémon, P.; Amandolese, X.

    2011-11-01

    The study deals with the transient behaviour of a two degrees of freedom bridge deck section in a wind tunnel under the effect of an initial excitation. Response of the bridge deck section subjected to an initial mechanical excitation and excitation by an upstream gust is investigated separately. Experiments are conducted with three different frequency ratios between the plunge and pitch degrees of freedom. This experimental study shows that transient growth of energy occurs for wind velocities below the onset of flutter, reaching a level higher than 5 times the level of the initial excitation. In high wind conditions, this means that statistical or spectral computation techniques might underestimate the motion amplitude reached by a flexible bridge deck. This emphasises the importance of using temporal techniques under such circumstances.

  19. Crack Surveys of Low-Cracking High-Performance Concrete Bridge Decks in Kansas 2014-2015

    E-print Network

    Alhmood, Abdallah; Darwin, David; O’ Reilly, Matt

    2015-09-01

    Crack surveys were performed on Low-Cracking High-Performance Concrete (LC-HPC) and Control bridge decks as a continuation of the Construction of Crack-Free Concrete Bridge Decks research project. The specifications for LC-HPC and procedures...

  20. Wireless monitoring of the longitudinal displacement of the Tamar Suspension Bridge deck under changing environmental conditions

    NASA Astrophysics Data System (ADS)

    de Battista, Nicky; Westgate, Robert; Koo, Ki Young; Brownjohn, James

    2011-04-01

    In order to be able to monitor the performance and health of a civil structure it is essential to understand how it behaves under different environmental conditions. It is a well documented fact that the structural performance of bridges can be altered considerably when they are subjected to changes in environmental conditions. This paper presents a study investigating the longitudinal movement of the road deck on Tamar Suspension Bridge in Plymouth in the UK over six months. The expansion joint of the bridge deck was instrumented with pull-wire type extensometers. The data were transmitted wirelessly using commercial wireless sensor nodes and collected at a data acquisition laptop computer, which was accessible online for remote monitoring. In addition, position data of various locations on the bridge deck were collected using a Robotic Total Station (RTS). Environmental data, such as the temperature, and structural data, such as cable tension, were acquired from other monitoring systems. Conclusions drawn from a fusion of the bridge deck's longitudinal displacement with other structural and environmental data are discussed in this paper.

  1. HURRICANE INDUCED WAVE AND SURGE FORCES ON BRIDGE DECKS 

    E-print Network

    McPherson, Ronald L.

    2010-01-16

    The damaging effects of hurricane landfall on US coastal bridges have been studied using physical model testing. Hurricane bridge damage and failure susceptibility has become very evident, especially during hurricane seasons 2004 and 2005...

  2. Using emissivity-corrected thermal maps to locate deep structural defects in concrete bridge decks

    SciTech Connect

    Del Grande, N.K.; Durbin, P.F.

    1995-04-05

    Dual-band infrared (DBIR) thermal imaging is a promising, non-contact, nondestructive evaluation tool to evaluate the amount of deteriorated concrete on asphalt-covered bridge decks. We conducted proof-of-principle demonstrations to characterize defects in concrete structures which could be detected with DBIR thermal imaging. We constructed two identical concrete slabs with synthetic delaminations, e.g., 1/8-in. thick styrofoam squares, implanted just above the 2-in.-deep steel reinforcement bars. We covered one of the slabs with a 2-in. layer of asphalt. We mounted the DBIR cameras on a tower platform, to simulate the optics needed to conduct bridge-deck inspections from a moving vehicle. We detected 4-in. implants embedded in concrete and 9-in. implants embedded in asphalt-covered concrete. The midday (above-ambient) and predawn (below-ambient) delamination-site temperatures correlated with the implant sizes. Using DBIR image ratios, we enhanced thermal-contrast and removed emissivity-noise, e.g., from concrete compositional variations and clutter. Using the LLNL/VIEW code, we removed the asphalt thermal-gradient mask, to depict the 4-in. deep, 9-in. square, concrete implant size. We plan to image bridge deck defects, from a moving vehicle, for accurate estimations of the amount of deteriorated concrete impairing the deck integrity. Potential longterm benefits are affordable and reliable rehabilitation for asphalt-covered decks.

  3. Characterization of stormwater runoff from bridges in North Carolina and the effects of bridge deck runoff on receiving streams

    USGS Publications Warehouse

    Wagner, Chad; Fitzgerald, Sharon A.; Sherrell, Roy D.; Harned, Douglas A.; Staub, Erik L.; Pointer, Brian H.; Wehmeyer, Loren L.

    2011-01-01

    In 2008, the North Carolina General Assembly passed House Bill 2436 that required the North Carolina Department of Transportation (NCDOT) to study the water-quality effects of bridges on receiving streams. In response, the NCDOT and the U.S. Geological Survey (USGS) collaborated on a study to provide information necessary to address the requirements of the Bill. To better understand the effects of stormwater runoff from bridges on receiving streams, the following tasks were performed: (1) characterize stormwater runoff quality and quantity from a representative selection of bridges in North Carolina; (2) measure stream water quality upstream from selected bridges to compare bridge deck stormwater concentrations and loads to stream constituent concentrations and loads; and (3) determine if the chemistry of bed sediments upstream and downstream from selected bridges differs substantially based on presence or absence of a best management practice for bridge runoff.

  4. 1. View,looking east,of the deck of the bridge taken from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. View,looking east,of the deck of the bridge taken from the intersection of w. 25th Street and Detroit Avenue. The bridge connects the city's east and west side over the Cuyahoga River Valley. Photograph illustrates the flared approaches designed to accommodate an, open well, through which streetcars could enter the bridge's lower level. This plan was later abandoned after construction had already begun, in favor of short subways that would carry the streetcars west beneath Detroit Avenue for a distance of 725 feet and south beneath W. 25th St. for a distance of 560 feet. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

  5. Experimental Investigation of the Role of Entrapped Air on Solitary Wave Forces on a Coastal Bridge Deck

    E-print Network

    . These results have very important implications on the design of coastal bridges, and it is recommended that design regulations stipulate that bridges must have adequately sized air relief openings on the decksExperimental Investigation of the Role of Entrapped Air on Solitary Wave Forces on a Coastal Bridge

  6. Numerical simulations and experimental measurements of steel and ice impacts on concrete for acoustic interrogation of delaminations in bridge decks

    SciTech Connect

    Mazzeo, Brian A.; Patil, Anjali N.; Klis, Jeffrey M.; Hurd, Randy C.; Truscott, Tadd T.; Guthrie, W. Spencer

    2014-02-18

    Delaminations in bridge decks typically result from corrosion of the top mat of reinforcing steel, which leads to a localized separation of the concrete cover from the underlying concrete. Because delaminations cannot be detected using visual inspection, rapid, large-area interrogation methods are desired to characterize bridge decks without disruption to traffic, without the subjectivity inherent in existing methods, and with increased inspector safety. To this end, disposable impactors such as water droplets or ice chips can be dropped using automatic dispensers onto concrete surfaces to excite mechanical vibrations while acoustic responses can be recorded using air-coupled microphones. In this work, numerical simulations are used to characterize the flexural response of a model concrete bridge deck subject to both steel and ice impactors, and the results are compared with similar experiments performed in the laboratory on a partially delaminated concrete bridge deck slab. The simulations offer greater understanding of the kinetics of impacts and the responses of materials.

  7. Numerical simulations and experimental measurements of steel and ice impacts on concrete for acoustic interrogation of delaminations in bridge decks

    NASA Astrophysics Data System (ADS)

    Mazzeo, Brian A.; Patil, Anjali N.; Klis, Jeffrey M.; Hurd, Randy C.; Truscott, Tadd T.; Guthrie, W. Spencer

    2014-02-01

    Delaminations in bridge decks typically result from corrosion of the top mat of reinforcing steel, which leads to a localized separation of the concrete cover from the underlying concrete. Because delaminations cannot be detected using visual inspection, rapid, large-area interrogation methods are desired to characterize bridge decks without disruption to traffic, without the subjectivity inherent in existing methods, and with increased inspector safety. To this end, disposable impactors such as water droplets or ice chips can be dropped using automatic dispensers onto concrete surfaces to excite mechanical vibrations while acoustic responses can be recorded using air-coupled microphones. In this work, numerical simulations are used to characterize the flexural response of a model concrete bridge deck subject to both steel and ice impactors, and the results are compared with similar experiments performed in the laboratory on a partially delaminated concrete bridge deck slab. The simulations offer greater understanding of the kinetics of impacts and the responses of materials.

  8. An Automatic Impact-based Delamination Detection System for Concrete Bridge Decks

    SciTech Connect

    Zhang, Gang; Harichandran, Ronald S.; Ramuhalli, Pradeep

    2012-01-02

    Delamination of concrete bridge decks is a commonly observed distress in corrosive environments. In traditional acoustic inspection methods, delamination is assessed by the "hollowness" of the sound created by impacting the bridge deck with a hammer or bar or by dragging a chain where the signals are often contaminated by ambient traffic noise and the detection is highly subjective. In the proposed method, a modified version of independent component analysis (ICA) is used to filter the traffic noise. To eliminate subjectivity, Mel-frequency cepstral coefficients (MFCC) are used as features for detection and the delamination is detected by a radial basis function (RBF) neural network. Results from both experimental and field data suggest that the proposed methods id noise robust and has satisfactory performance. The methods can also detect the delamination of repair patches and concrete below the repair patches. The algorithms were incorporated into an automatic impact-bases delamination detection (AIDD) system for field application.

  9. Impedance spectroscopy of concrete cover on bridge decks with reinforcing steel

    NASA Astrophysics Data System (ADS)

    Bartholomew, Paul; Blankenagel, Bryan; Guthrie, Spencer; Mazzeo, Brian

    2011-10-01

    Chloride-induced corrosion of reinforcing steel is a major problem for aging bridge structures near marine environments or in cold regions where deicing salts are applied as part of winter maintenance. Corrosion is the result of the interaction of diffused chloride ions with the embedded steel. One property of affected decks that facilitates detection of chloride ions is their ability to conduct electricity. Impedance spectroscopy can be used to measure concrete conductivity and thereby identify areas of increased chloride concentration characterized by elevated risks of corrosion. A new probe and measurement apparatus has been engineered to measure large areas of concrete on bridge decks. Comparison between measurements obtained in the laboratory and in the field will be presented.

  10. NORTON, TAYLOR MONTGOMERY. 3D Orthogonal Woven Glass Fiber Reinforced Polymeric Bridge Deck: Fabrication and Experimental Investigation. (Under the

    E-print Network

    ABSTRACT NORTON, TAYLOR MONTGOMERY. 3D Orthogonal Woven Glass Fiber Reinforced Polymeric Bridge. Amir Mirmiran.) Rapid deterioration of civil infrastructure has created one of the major challenges as a potential solution to the tribulations associated with deficient bridge decks. The main objective

  11. Real Time Detection of Defects in GFRP Bridge Decks Using Infrared Thermography

    NASA Astrophysics Data System (ADS)

    Klinkhachorn, P.; Lonkar, G. M.; Halabe, Udaya B.; GangaRao, Hota V. S.

    2006-03-01

    This work is aimed at building a real time system to detect subsurface defects in GFRP bridge decks using infrared thermography. The issues addressed are: (a) development of a real time defect detection system, and (b) image mosaicking to build a composite image map. In the tests conducted, a turn key system was built in Matlab environment using the FLIR SDK to acquire image from the ThermaCAM S60 infrared camera. The images were then analyzed by defect detection algorithms. Efforts were made to minimize the time to detect defects in a captured image. In the second phase, image mosaicking was used to build a "composite image" that combines all the infrared images to form a single image. The location of defects in the "composite image" leads to a system that will be able to point out defects in the bridge as a whole. The study creates a base that can be used for real time defect detection in GFRP bridge decks.

  12. Ground-penetrating imaging radar development for bridge deck and road bed inspection

    SciTech Connect

    Warhus, J.P.; Mast, J.E.; Nelson, S.D.; Johansson, E.M.

    1993-05-01

    Ground-penetrating imaging radar (GPIR) is proposed for large-area inspection of concrete and concrete/asphalt composite bridge decks and roadways. This technique combines ground-penetrating radar (GPR) with unique image reconstruction algorithms developed for identification and characterization of subsurface flaws and structural features. New data acquisition hardware and image reconstruction techniques, under development at LLNL, offer the possibility for reliable and efficient, high-resolution subsurface imaging through the use of improved ultra-wideband transmitters, antennas, and arrays, and enhanced image- and signal-processing software. A field test of a limited-capability prototype system is planned for FY-93, as is completion of a conceptual design for a practical inspection system. A follow-on program for FY-94 would focus on development and demonstration of an advanced bridge inspection system prototype based on the conceptual design completed during FY-93.

  13. Detection of Delamination in Concrete Bridge Decks Using Mfcc of Acoustic Impact Signals

    NASA Astrophysics Data System (ADS)

    Zhang, G.; Harichandran, R. S.; Ramuhalli, P.

    2010-02-01

    Delamination of the concrete cover is a commonly observed damage in concrete bridge decks. The delamination is typically initiated by corrosion of the upper reinforcing bars and promoted by freeze-thaw cycling and traffic loading. The detection of delamination is important for bridge maintenance and acoustic non-destructive evaluation (NDE) is widely used due to its low cost, speed, and easy implementation. In traditional acoustic approaches, the inspector sounds the surface of the deck by impacting it with a hammer or bar, or by dragging a chain, and assesses delamination by the "hollowness" of the sound. The detection of the delamination is subjective and requires extensive training. To improve performance, this paper proposes an objective method for delamination detection. In this method, mel-frequency cepstral coefficients (MFCC) of the signal are extracted. Some MFCC are then selected as features for detection purposes using a mutual information criterion. Finally, the selected features are used to train a classifier which is subsequently used for detection. In this work, a simple quadratic Bayesian classifier is used. Different numbers of features are used to compare the performance of the detection method. The results show that the performance first increases with the number of features, but then decreases after an optimal value. The optimal number of features based on the recorded signals is four, and the mean error rate is only 3.3% when four features are used. Therefore, the proposed algorithm has sufficient accuracy to be used in field detection.

  14. DEVELOPMENT AND CONSTRUCTION OF LOW-CRACKING HIGH-PERFORMANCE CONCRETE (LC-HPC) BRIDGE DECKS: FREE SHRINKAGE TESTS, RESTRAINED RING TESTS, CONSTRUCTION EXPERIENCE, AND CRACK SURVEY RESULTS

    E-print Network

    Yuan, Jiqiu

    2011-12-31

    The development, construction, and evaluation of low-cracking high-performance concrete (LC-HPC) bridge decks are described based on laboratory test results and experiences gained during the construction of 13 LC-HPC bridge decks in Kansas, along...

  15. Assessing effects of highway bridge deck runoff on near-by recieving waters in coastal margins using remote monitoring techniques 

    E-print Network

    Nwaneshiudu, Oke

    2005-02-17

    that was used in the assesment of Clear Creek and the FM 528 bridge deck was a part of the 11th method stated by Dupuis (1999). There are 2 9 methods disscused under the 11th method which are the simple method and the intensity corellation method...) suggested that when assesing bridges that the investigator should consider what the average daily traffic in the area is and if the bridge is a retrofit or a replacement bridge becuase some of the methods do not apply to the analysis depending...

  16. Structural Aspects of Railway Truss Bridges Affecting Transverse Shear Forces in Steel-Concrete Composite Decks

    NASA Astrophysics Data System (ADS)

    Siekierski, Wojciech

    2015-03-01

    At the steel-concrete interface, the horizontal shear forces that are transverse to cross beams occur due to joint action of the steel-concrete composite deck and the truss girders. Numerical analysis showed that values of the forces are big in comparison to the longitudinal shear forces. In both cases extreme force values occur near side edges of a slab. The paper studies possibilities of reduction of these shear forces by structural alterations of the following: rigidity of a concrete slab, arrangement of a wind bracing, arrangement of concrete slab expansion joints. An existing railway truss bridge span has been analysed. Numerical analysis shows that it is possible to reduce the values of shear forces transverse to cross beams. It may reach 20% near the side edges of slabs and 23% in the centre of slab width.

  17. Plans: Aft Gun Platform, Quarters for 16 Gunmen, Poop Deck, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Plans: Aft Gun Platform, Quarters for 16 Gunmen, Poop Deck, Boat Deck, House Top, Bridge Deck, Upper Bridge Deck, Navigating Bridge, Forecastle Deck, Gun Platform, Upper Deck, Second Deck and Hold Plan - Mission Santa Ynez, Suisun Bay Reserve Fleet, Benicia, Solano County, CA

  18. Multi-mode traffic-induced vibrations in composite ladder-deck bridges under heavy moving vehicles

    NASA Astrophysics Data System (ADS)

    Camara, A.; Ruiz-Teran, A. M.

    2015-10-01

    Composite (steel-concrete) ladder-decks represent one of the most common solutions in road bridges nowadays. In these structures the Serviceability Limit State (SLS) of vibrations is traditionally ignored or roughly addressed by means of simple static deflection-based approaches, inherently assuming that the vibrations are controlled by the fundamental longitudinal mode. This work demonstrates that a wide range of high-order vibrational modes, involving the transverse flexure of the slab between longitudinal girders, govern the accelerations recorded in the deck and inside the vehicles. In addition, a new methodology for analysing the Vehicle-Bridge Interaction is proposed, including the approaching platforms, the transition slabs, and the bridge joints. The results suggest that the riding comfort for vehicle users is specially affected by direct effects on the wheels, like the road roughness and possible construction misalignments at the bridge joints, as well as low-frequency vibrations coming from the deck in short or slender bridges. The filtering effects resulting from the average of the response in time and in space when calculating the root mean square acceleration are also explored, and new design parameters are provided. In addition, several structural features (such as the depth and spacing of the longitudinal and transverse steel beams, the thickness of the concrete slab, and the stiffness of the cantilever cross beams at the diaphragm sections) have been studied, and a set of new design criteria has been established. It has been demonstrated that the transverse flexibility of the deck (specially influenced by the support conditions and the slab thickness) is critically important for the users' (pedestrians and vehicle passengers) comfort, as it controls the aforementioned high-order vibrational modes which govern the dynamic response.

  19. Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks: Shrinkage-Reducing Admixtures, Internal Curing, and Cracking Performance

    E-print Network

    Pendergrass, Ben Andrew

    2014-05-31

    ABSTRACT The development, construction, and evaluation of low-cracking high-performance concrete (LC-HPC) bridge decks is described based on laboratory tests of mixtures containing shrinkage-reducing admixtures and mineral admixtures in conjunction...

  20. Development and Construction of Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks: Construction Methods, Specifications, and Resistance to Chloride Ion Penetration

    E-print Network

    McLeod, Heather Anne Kirkvold

    2009-08-22

    construction-related parameters. The results indicate that that successful LC-HPC bridge deck construction is repeatable and that clear and consistent communication between the contractor, owner, and testing personnel is vital for successful construction of LC...

  1. Application of Noise Cancelling and Damage Detection Algorithms in NDE of Concrete Bridge Decks Using Impact Signals

    SciTech Connect

    Zhang, Gang; Harichandran, Ronald S.; Ramuhalli, Pradeep

    2011-09-13

    Delamination is a commonly observed distress in concrete bridge decks. Among all the delamination detection methods, acoustic methods have the advantages of being fast and inexpensive. In traditional acoustic inspection methods, the inspector drags a chain along or hammers on the bridge deck and detects delamination from the 'hollowness' of the sounds. The signals are often contaminated by ambient traffic noise and the detection of delamination is highly subjective. This paper describes the performance of an impact-bases acoustic NDE method where the traffic noise was filtered by employing a noise cancelling algorithm and where subjectivity was eliminated by introducing feature extraction and pattern recognition algorithms. Different algorithms were compared and the best one was selected in each category. The comparison showed that the modified independent component analysis (ICA) algorithm was most effective in cancelling the traffic noise and features consisting of mel-frequency cepstral coefficients (MFCCs) had the best performance in terms of repeatability and separabillty. The condition of the bridge deck was then detected by a radial basis function (RBF) neural network. The performance of the system was evaluated using both experimental and field data. The results show that the selected algorithms increase the noise robustness of acoustic methods and perform satisfactorily if the training data is representative.

  2. Performance of epoxy-coated reinforced steel in the deck of the Perley Bridge

    SciTech Connect

    Covino, Bernard S., Jr.; Cramer, Stephen D.; Holcomb, Gordon R.; Russell, James H.; Bullard, Sophie J.; Dahlin, Cheryl L.; Tinnea, J.S.

    2001-01-01

    The Perley Bridge spanned the Ottawa River between the Canadian provinces of Ontario and Quebec from 1931 to 1999. Epoxy-coated steel reinforcing bar (ECR) was used in 1979 in an effort to extend the service life of span 17. Patches were needed to repair corrosion of the west lane as little as 7 to 11 years later. No patches were needed for the east lane which had twice the cover concrete of the west lane. Examinations showed that the original concrete in both lanes and the patch concrete in the west lane were of good quality. Epoxy adhesion to the steel reinforcing bar was good to fair over much of the reinforcing bar, but poor to failed in isolated areas. Analytical scanning electron microscopy (ASEM) identified voids, rust, cracked epoxy, and cracked concrete at some ECR locations. Chloride profiling of the concrete in both lanes, coupled with the corrosion threshold level of chloride, indicated that the time required for corrosion to cause visible damage of the deck was 6.2 years for the west lane and 18.9 years for the east lane.

  3. Plans: 3'/50 Cal. Gun Platform, Boat Deck House Top & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Plans: 3'/50 Cal. Gun Platform, Boat Deck House Top & Fidley Top, Boat Deck, Radar Platform Lower, Pilot House Top, Navigation Bridge, Upper Bridge Deck, Poop Deck, Cargo Deck, Motor Boat Platform, Bridge Deck, Forecastle Deck, Upper Deck - Taluga, Suisun Bay Reserve Fleet, Benicia, Solano County, CA

  4. Ground penetrating radar and microwave tomography 3D applications for the deck evaluation of the Musmeci bridge in Potenza, Italy

    NASA Astrophysics Data System (ADS)

    Bavusi, Massimo; Soldovieri, Francesco; Di Napoli, Rosario; Loperte, Antonio; Di Cesare, Antonio; Carlo Ponzo, Felice; Lapenna, Vincenzo

    2011-09-01

    An extensive experimental and numerical investigation has been carried out to assess the status of the 'Ponte sul Basento' (1967-1976), in the town of Potenza (Basilicata region, southern Italy), better known as the Musmeci bridge. Architecturally, the bridge is a considerable reinforced 20th century concrete structure that was designed and built by the Italian architect Sergio Musmeci (1926-1981). Moreover, the bridge represents an important element of the infrastructural network, linking the city centre to the Potenza-Sicignano highway, crossing the Basento river and the railway close to the main train station of the city. Recently, due to ageing and continuous and significant traffic, the bridge started to be affected by several problems such as water infiltration. Within the presented study, a widespread ground penetrating radar (GPR) survey has been designed to investigate the geometrical characteristics of the bridge deck (Gerber saddles, internal stiffening walls, pillar supports) and detect the presence of defects or damage due to water infiltration and traffic fatigue. Concerning this, a 900 MHz 3D GPR survey has been performed along a zone of one of the lanes on the road surface. Moreover, a second 1500 MHz 3D survey has been carried out at the bottom of the bridge deck in order to gain detailed information about an important structural element of the bridge, the Gerber saddle. Both results have been processed following two approaches: the first a classical time-domain processing session based on commercial software and the use of migration; the second in microwave tomography, an advanced frequency domain automatic PC-based inversion algorithm. In this paper, we present a comparative interpretation of both kinds of processed results, and provide considerations about the investigated structures.

  5. Impact of Environmental Effects on, and Condition Assessment of IBRC Bridge Decks

    E-print Network

    Foley, Christopher M.

    for looking at the bond between FRP formwork and concrete decks. This thesis will evaluate freeze program to evaluate freeze-thaw cycling. Thank you all! To all those back at Valparaiso University who got Polymer (FRP) reinforcement and stay-in-place deck forms can be used to save construction time, improve

  6. Development and Construction of Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks: Free Shrinkage, Mixture Optimization, and Concrete Production

    E-print Network

    Lindquist, Will David

    2008-01-01

    The development and evaluation of low-cracking high-performance concrete (LC-HPC) for use in bridge decks is described based on laboratory test results and experience gained during the construction of 14 bridges. The study is divided into three...

  7. Performance evaluation of waterproofing membrane protective systems for concrete bridge decks. Final report 3 January-3 November 1983

    SciTech Connect

    Babaei, K.; Terrel, R.L.

    1983-08-01

    This study develops a methodology for field appraisal and evaluates the effectiveness of three selected waterproofing membrane installations presently in service in the State of Washington. Based on the information obtained, none of the test installations had completely sealed the passage of salt into the concrete decks. 'Active' and 'uncertain' corrosion potentials existed at the rehabilitated portions; however, a decrease in corrosion activity since the time of rehabilitation was noted. Concrete deterioration after rehabilitation has occurred mainly within the boundaries of the repair work and original concrete, and it is more evident in areas with a shallower rebar depth. It is recommended that future research include a greater number of bridge decks. In addition, service life performance data should be obtained through long-range monitoring of the installations.

  8. Limitations and advantages of sonic and ultrasonic methods as tools for maintenance management of bridge decks and concrete slabs

    NASA Astrophysics Data System (ADS)

    Nazarian, Soheil; Baker, Mark R.

    1996-11-01

    Sonic and ultrasonic methods are excellent tools for diagnosis of problems with concrete slabs and bridge decks. However, it is important to fully understand the limitations of these methods. The conditions where these methods are most effective and those where the methods may not yield satisfactory results are presented. More importantly, cases when an integrated approach can be the best solutions are also outlined. This paper serves as a guideline for practitioners with a practical understanding of the methods to assess the theoretical and experimental limitations of these methods.

  9. Development and construction of low-cracking high-performance concrete (LC-HPC) bridge decks: Free shrinkage tests, restrained ring tests, construction experience, and crack survey results

    NASA Astrophysics Data System (ADS)

    Yuan, Jiqiu

    2011-12-01

    The development, construction, and evaluation of low-cracking high-performance concrete (LC-HPC) bridge decks are described based on laboratory test results and experiences gained during the construction of 13 LC-HPC bridge decks in Kansas, along with another deck bid under the LC-HPC specifications but for which the owner did not enforce the specification. This study is divided into four parts covering (1) an evaluation of the free shrinkage properties of LC-HPC candidate mixtures, (2) an investigation of the relationship between the evaporable water content in the cement paste and the free shrinkage of concrete, (3) a study of the restrained shrinkage performance of concrete using restrained ring tests, and (4) a description of the construction and preliminary evaluation of LC-HPC and control bridge decks constructed in Kansas. The first portion of the study involves evaluating the effects of the duration of curing, fly ash, and a shrinkage reducing admixture (SRA) on the free-shrinkage characteristics of concrete mixtures. The results indicate that an increase of curing period reduces free shrinkage. With 7 days of curing, concretes containing fly ash as a partial replacement for cement exhibit higher free shrinkage than concretes with 100% portland cement. When the curing period is increased to 14, 28, and 56 days, the adverse effect of adding fly ash on free shrinkage is minimized and finally reversed. The addition of an SRA significantly reduces free shrinkage for both the 100% portland cement mixture and the mixture containing fly ash. The second portion of the study investigates the relationship between the evaporable water content in the cement paste and the free shrinkage of concrete. A linear relationship between free shrinkage and evaporable water content in the cement paste is observed. For a given mixture, specimens cured for a longer period contain less evaporable water and exhibit lower free shrinkage and less weight loss in the free shrinkage specimens than those cured for a shorter period. The third portion of the study evaluates the cracking tendency of concrete mixtures using the restrained ring tests. Different concrete ring thicknesses and drying conditions have been tested. The results indicate that specimens with thinner concrete rings crack earlier than those with thicker concrete rings. Exposing specimens to severe drying conditions results in the earlier formation of cracks, although it does not result in increased crack width. Mixtures with a lower water-cement (w/c) ratio crack earlier than mixtures with a higher w/c ratio. Concretes with a higher paste content crack earlier than concretes with a lower paste content. The final portion of the study details the development, construction, and preliminary performance (with most bridges at three years of age) of LC-HPC and control bridge decks in Kansas. The results indicate that the techniques embodied in the LC-HPC bridge deck specifications are easy to learn. Contractor personnel can be trained in a relatively short time. The techniques used for LC-HPC bridge decks are effective in reducing bridge deck cracking. The crack surveys indicate that LC-HPC bridge decks are performing much better than the control decks, with average crack densities reduced by about seventy five percent at three years of age. The factors that may affect bridge deck cracking are analyzed. The analyses indicate that an increase in paste content, slump, compressive strength, maximum daily air temperature, and daily air temperature range causes increased crack densities. Contractor techniques influence cracking. Keywords: bridge construction, bridge deck, contractor, concrete mix design, compressive strength, cracking, curing, evaporable water, fly ash, free shrinkage, high-performance concrete, non-evaporable water, paste content, restrained shrinkage, restrained ring tests, shrinkage reducing admixture, slump

  10. Reflected Deck Plan, Reflected Roof Plan, Deck Plan Bridgeport ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Reflected Deck Plan, Reflected Roof Plan, Deck Plan - Bridgeport Covered Bridge, Spanning South Fork of Yuba River at bypassed section of Pleasant Valley Road (originally Virginia Turnpike) in South Yuba River State Park , Bridgeport, Nevada County, CA

  11. 19. view from below deck showing Pier 2, deck stringers, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. view from below deck showing Pier 2, deck stringers, railing, counterweight and superstructure. VIEW WEST - Chelsea Street Bridge & Draw Tender's House, Spanning Chelsea River, Boston, Suffolk County, MA

  12. A Methodology to Assess the Degradation in the Structural Response of the Deck of a Reinforced Concrete Road Bridge due to Corrosion of Reinforcing Steel

    NASA Astrophysics Data System (ADS)

    Banerjee, Soumendra; Sengupta, Amlan K.

    2012-02-01

    The present paper provides a methodology to analyse the effect of corrosion on the strength and stiffness of the slab-and-girder deck of a road bridge. A linear finite element model of a typical medium span deck of an existing bridge was developed as per the as-built drawings. The vehicular loadings were as per the recommendations of the Indian Roads Congress specifications and the design rating of the bridge. Based on the phenomenon of corrosion, a time-dependent reduction in the area of flexural reinforcement near the soffits of the girders, was considered in the model. The effects of flexural cracking, creep and spalling of concrete were incorporated in the model with non-prismatic section properties and their stage-wise variations. From the analyses of a girder section and the computational model, it was observed that due to corrosion, the allowable moment capacity of a girder falls below the demand under dead load plus the rated live load, within the target service life of the bridge. However, the effect of corrosion on the stiffness of the deck is not substantial to be accurately measured by a conventional sensor. It is recommended that the procedure adopted in the paper can be used by the practicing professionals for numerically assessing longer span decks, to have a'priori estimates of the quantities that can be measured in a field test.

  13. Bridge deck surface temperature monitoring by infrared thermography and inner structure identification using PPT and PCT analysis methods

    NASA Astrophysics Data System (ADS)

    Dumoulin, Jean

    2013-04-01

    One of the objectives of ISTIMES project was to evaluate the potentialities offered by the integration of different electromagnetic techniques able to perform non-invasive diagnostics for surveillance and monitoring of transport infrastructures. Among the EM methods investigated, we focused our research and development efforts on uncooled infrared camera techniques due to their promising potential level of dissemination linked to their relative low cost on the market. On the other hand, works were also carried out to identify well adapted implementation protocols and key limits of Pulse Phase Thermography (PPT) and Principal Component Thermography (PCT) processing methods to analyse thermal image sequence and retrieve information about the inner structure. So the first part of this research works addresses infrared thermography measurement when it is used in quantitative mode (not in laboratory conditions) and not in qualitative mode (vision applied to survey). In such context, it requires to process in real time thermal radiative corrections on raw data acquired to take into account influences of natural environment evolution with time, thanks to additional measurements. But, camera sensor has to be enough smart to apply in real time calibration law and radiometric corrections in a varying atmosphere. So, a complete measurement system was studied and developed [1] with low cost infrared cameras available on the market. In the system developed, infrared camera is coupled with other sensors to feed simplified radiative models running, in real time, on GPU available on small PC. The whole measurement system was implemented on the "Musmeci" bridge located in Potenza (Italy). No traffic interruption was required during the mounting of our measurement system. The infrared camera was fixed on top of a mast at 6 m elevation from the surface of the bridge deck. A small weather station was added on the same mast at 1 m under the camera. A GPS antenna was also fixed at the basis of the mast and at a same elevation than the bridge deck surface. This trial took place during 4 days, but our system was leaved in stand alone acquisition mode only during 3 days. Thanks to the software developed and the small computer hardware used, thermal image were acquired at a frame rate of 0.1 Hz by averaging 50 thermal images leaving the original camera frame rate fixed at 5 Hz. Each hour, a thermal image sequence was stored on the internal hard drive and data were also retrieved, on demand, by using a wireless connection and a tablet PC. In the second part of this work, thermal image sequences analysis was carried out. Two analysis approaches were studied: one based on the use of the Fast Fourier Transform [2] and the second one based on the Principal Component Analysis [3-4]. Results obtained show that the inner structure of the deck was identified though thermal images were affected by the fact that the bridge was open to traffic during the whole experiments duration. ACKNOWLEDGEMENT - The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant Agreement n° 225663. References [1] Dumoulin J. and Averty R., « Development of an infrared system coupled with a weather station for real time atmospheric corrections using GPU computing: Application to bridge monitoring", QIRT 2012, Naples, Italy, June 2012. [2] Cooley J.W., Tukey J.W., "An algorithm for the machine calculation of complex Fourier series", Mathematics of Computation, vol. 19, n° 90, 1965, p. 297-301. [3] Rajic N., "Principal component thermography for flaw contrast enhancement and flaw depth characterization in composite structures", Composite Structures, vol 58, pp 521-528, 2002. [4] Marinetti S., Grinzato E., Bison P. G., Bozzi E., Chimenti M., Pieri G. and Salvetti O. "Statistical analysis of IR thermographic sequences by PCA," Infrared Physics & Technology vol 46 pp 85-91, 2004.

  14. Smart Control of a Geothermally Heated Bridge Deck Stephen C. Jenks (o) 580-767-4374

    E-print Network

    Beak International Incorporated (f) 905-794-2338 14 Abacus Road KPandit@beak.com Brampton, Ontario, L6T National Weather Service (NWS) forecasts to prevent bridge icing without the use of salt or other chemical appears on approaching sections of road), represents a major transportation safety issue. A common

  15. Stopper-Bearing System – A Solution to Displacement Control of Bridge Decks 

    E-print Network

    Tsai, Yi-Te

    2010-10-12

    of the SBS is obtained from ABAQUS and used to define the SBS within reinforced concrete analytical bridge models developed in SAP2000, which are subjected to the 1999 Chi- Chi, Taiwan earthquake ground motion (1.01g - E-W component and 0.43g - N-S component...

  16. DEVELOPlVlENT OF :\\,IODULAR GFRP BRIDGE DECKS Brea Williams, Sami Rizkalla

    E-print Network

    , Canada ROC IBO faroex@faroex.com ABSTRACT The demand for the development of more efficient and durable-half of the United States' 600,000 state, county and city bridges were built prior to 1940 (Zureick et aI, 1995

  17. Seismic Integrity of a Long Span Bridge with Tower-Deck Buffers

    SciTech Connect

    Casciati, Fabio; Giuliano, Fabio

    2008-07-08

    The wind action is acknowledged to be the primary environmental load in the design of suspension bridges. It affects both the performance of safety and serviceability. Nevertheless, the impact of earthquakes cannot be neglected especially when the construction site is located in a high seismicity region. The evaluation of the vulnerability of a suspension bridge requires a hazard analysis on the site, the definition of the seismic intensity related to the desired return periods, the generation of artificial signals for the reference site and the collection of critical records for integrity analyses,. The signals will then be used in the structural analyses for the verification of structural safety and structural robustness. This paper is focused on the generation of these critical signals, with their own a-synchronicity, and the associated numerical nonlinear analyses, which must be conducted in the time domain.

  18. HERMES: a high-speed radar imaging system for inspection of bridge decks

    SciTech Connect

    Azevedo, S.G.

    1996-10-26

    Corrosion of rebar in concrete bridges causes subsurface cracks and is a major cause of structural degradation that necessitates repair or replacement. Early detection of corrosion effects can limit the location and extent of necessary repairs, while providing long-term information about the infrastructure status. Most current detection methods, however, are destructive of the road surface and require closing or restricting traffic while the tests are performed. A ground-penetrating radar imaging system has been designed and developed that will perform the nondestructive evaluation of road-bed cracking at traffic speeds; i.e., without the need to restrict traffic flow. The first-generation system (called the HERMES bridge inspector), consists of an offset-linear array of 64 impulse radar transceivers and associated electronics housed in a trailer. Computers in the trailer and in the towing vehicle control the data acquisition, processing, and display. Cross-road resolution is three centimeters at up to 30 cm in depth, while down-road resolution depends on speed; 3 cm below 20 mph up to 8 cm at 50 mph. A two-meter- wide path is inspected on each pass over the roadway. This paper, describes the design of this system, shows preliminary results, and lays out its deployment schedule.

  19. Pavement management

    SciTech Connect

    Ross, F.R.; Connor, B.; Lytton, R.L.; Darter, M.I.; Shahin, M.Y.

    1982-01-01

    The 11 papers in this report deal with the following areas: effect of pavement roughness on vehicle fuel consumption; rational seasonal load restrictions and overload permits; state-level pavement monitoring program; data requirements for long-term monitoring of pavements as a basis for development of multiple regression relations; simplified pavement management at the network level; combined priority programming of maintenance and rehabilitation for pavement networks; Arizona pavement management system: Phase 2-verification of performance prediction models and development of data base; overview of paver pavement management system; economic analysis of field implementation of paver pavement management system; development of a statewide pavement maintenance management system; and, prediction of pavement maintenance expenditure by using a statistical cost function.

  20. Reflected Ceiling Plan/Reflected Deck Plan 2009; Reflected Ceiling Plan/Reflected Deck ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Reflected Ceiling Plan/Reflected Deck Plan 2009; Reflected Ceiling Plan/Reflected Deck Plan 2010 - Gilpin's Falls Covered Bridge, Spanning North East Creek at Former (Bypassed) Section of North East Road (SR 272), North East, Cecil County, MD

  1. 15. DETAIL, UNDERSIDE OF DECK, FROM BELOW AND WEST, SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. DETAIL, UNDERSIDE OF DECK, FROM BELOW AND WEST, SHOWING STRUCTURAL CONFIGURATION, INCLUDING FLOOR BEAMS, STRINGERS, BRACING, AND STEEL MESH DECK - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  2. 37. HANGAR FROM RAILROAD DECK TELESCOPED IN COLUMN & SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    37. HANGAR FROM RAILROAD DECK TELESCOPED IN COLUMN & SHOWING PIN WHICH TRANSFERS LOAD FROM RAILROAD DECK TO TRUSS WHEN IN DOWN POSITION - Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO

  3. Augmenting BIM with 3D Imaging Data to Control Drilling for Embeds into Reinforced Concrete Bridge Decks

    E-print Network

    Kamat, Vineet R.

    Augmenting BIM with 3D Imaging Data to Control Drilling for Embeds into Reinforced Concrete Bridge: vkamat@umich.edu ABSTRACT Placing embeds into reinforced concrete structures, after concrete is poured. Although negative impressions for embeds can be made by placing various objects such as wooden dowels

  4. Bridges

    USGS Multimedia Gallery

    Bridges from top to bottom: Expressway Bridge, Liberty Memorial Bridge, Burlington Northern SantaFe Railway Bridge, and Interstate 94 Grant Marsh Bridge. Photo taken by USGS personnel on a Civil Air Patrol flight....

  5. 11. Standing on westerly fender at edge of bridge looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Standing on westerly fender at edge of bridge looking easterly, showing horizontal beams for deck and cross beams (reflection of steel grating on deck). Also shows bridge guardrail. - Colusa Bridge, Spanning Sacramento River, Colusa, Colusa County, CA

  6. SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN vSHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN - Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake River, Starbuck, Columbia County, WA

  7. DUCTILE END-DIAPHRAGMS TO SEISMICALLY RETROFIT SHORT AND MEDIUM SPAN STEEL BRIDGES

    E-print Network

    Bruneau, Michel

    calibrated to yield before the strength of the substructure (and superstructure for deck-truss bridges be considered, as it has an impact on behaviour. For deck-truss bridges, conversion of the deck slab-on-girder steel bridges, and for deck-truss bridges. The latter case is more complex, as it requires conversion

  8. 29. VIEW EAST FROM DECKING ON NORTHWEST CORNER OF PIVOT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. VIEW EAST FROM DECKING ON NORTHWEST CORNER OF PIVOT PIER, DRIVE SYSTEM FOR SWING-SPAN INCLUDES: (from left to right) BULL WHEEL, GEARING AND DRIVE SHAFTS, INCLUDING MANUAL DRIVE ACCESSED THROUGH BRIDGE DECK, ELECTRIC LINES FROM SHORE, AND TRACK AND RAIL ON CONCRETE PIER - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  9. Guide Specification for Highway Construction Texturing Concrete Pavement for

    E-print Network

    and by tining. 4. DRAG PRETEXTURE 4.1. Drag artificial turf or burlap longitudinally along the concrete pavement surface after finishing to enhance texture. The turf or burlap shall be mounted on a work bridge or a moveable support system capable of varying the area of turf or burlap in contact with the pavement. 4

  10. CONCRETE PAVEMENT Reference Manual

    E-print Network

    CONCRETE PAVEMENT Reference Manual Prepared for Federal Highway Administration Office of Pavement by National Concrete Pavement Technology Center at Iowa State University 2711 South Loop Drive, Suite 4700 No. 3. Recipient's Catalog No. 4. Title and Subtitle 5. Report Date February 2008 Concrete Pavement

  11. Pavement Thickness Design Parameter

    E-print Network

    Pavement Thickness Design Parameter Impacts 2012 Municipal Streets Seminar November 14, 2012 Paul D. Wiegand, P.E. #12;Pavement Thickness Design · How do cities decide how thick to build their pavements;Pavement Thickness Design · Correct answer ­ A data-based analysis! · Doesn't have to be difficult and time

  12. INNOVATIVE DESIGN AND TESTING OF A SEISMIC RETROFITTED STEEL DECK TRUSS

    E-print Network

    Bruneau, Michel

    INNOVATIVE DESIGN AND TESTING OF A SEISMIC RETROFITTED STEEL DECK TRUSS BRIDGE Dr. Majid Sarraf, P truss bridges include seismic isolation, strengthening of substructure and superstructure structural of a steel deck- truss bridge was designed, detailed and fabricated at the University of Ottawa, Canada

  13. Pavement management and rehabilitation of portland cement concrete pavements

    NASA Astrophysics Data System (ADS)

    Zegeer, C. V.; Agent, K. R.; Rizenbergs, R. L.; Curtayne, P. C.; Scullion, T.; Pedigo, R. D.; Hudson, W. R.; Roberts, F. L.; Karan, M. A.; Haas, R.

    Pavement management and rehabilitation projects and techniques are discussed. The following topics are discussed: economic analyses and dynamic programming in resurfacing project selection; implementation of an urban pavement management system; pavement performance modeling for pavement management; illustration of pavement management: from data inventory to priority analysis; rehabilitation of concrete pavements by using portland cement concrete overlays; pavement management study: Illinois tollway pavement overlays; resurfacing of plain jointed-concrete pavements; design procedure for premium composite pavement; model study of anchored pavement; prestressed concrete overlay at O'Hare International Airport: in-service evaluation; and, bonded portland cement concrete resurfacing.

  14. Pavement Testing Machine Under Repair 

    E-print Network

    Unknown

    2011-08-17

    Pavement smoothness has become a standard measure of pavement quality. Transportation agencies strive to build and maintain smoother pavements. Smooth roads provide comfort while riding, minimize vehicular wear and tear and increase pavement life. A...

  15. View, underside of deck, from northwest and below, showing structural ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View, underside of deck, from northwest and below, showing structural configuration, including pin connections of vertical truss members to lower chord, transverse floor beams, stringers, lateral bracing, concrete deck, and squared cut stone masonry center pier, including upstream concrete encased nose - Castle Garden Bridge, Township Route 343 over Bennetts Branch of Sinnemahoning Creek, Driftwood, Cameron County, PA

  16. VIEW OF BRIDGE, LOOKING SOUTHWEST, WITH SOUTHERN PACIFIC RAILROAD BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF BRIDGE, LOOKING SOUTHWEST, WITH SOUTHERN PACIFIC RAILROAD BRIDGE IN BACKGROUND. THE PAVEMENT OF THE NORTH APPROACH IS SEEN BURIED ON THE RIGHT. ROADWAY (CENTER) CROSSES THE USUALLY DRY CHANNEL OF THE SALT RIVER. A BALUSTRADE OF THE MILL AVENUE BRIDGE IS SEEN AT THE LOWER LEFT CORNER - Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, Maricopa County, AZ

  17. 9. VIEW SHOWING TRUSSES FROM DECK WITH 4' RANGE POLE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW SHOWING TRUSSES FROM DECK WITH 4' RANGE POLE AT SECOND VERTICAL POST ON SOUTH SIDE, LOOKING WEST - White River Bridge, Spanning White River at U.S. Highway 70, De Valls Bluff, Prairie County, AR

  18. 13. VIEW SHOWING SOUTH SIDE OF TRUSS, BATTERBRACE, TRAFFIC DECK ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. VIEW SHOWING SOUTH SIDE OF TRUSS, BATTERBRACE, TRAFFIC DECK AND ABUTMENT, LOOKING WEST - Shenandoah River Bridge, Spanning North fork of Shenandoah River on Virginia State Route 767, Quicksburg, Shenandoah County, VA

  19. 9. DETAIL OF PRATT DECK TRUSS, AND NORTH PORTAL OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. DETAIL OF PRATT DECK TRUSS, AND NORTH PORTAL OF PENNSYLVANIA PETIT TRUSS WITH CONCRETE SUPPORTING PIER, LOOKING SOUTHWEST - James Bethel Gresham Memorial Bridge, Spanning Green Pond River at Kentucky Route 81, Calhoun, McLean County, KY

  20. 15. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL CYLINDER PIERS, FROM EAST RIVERBANK. VIEW TO NORTHWEST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  1. 7. WEST PORTAL AND DECK VIEW, FROM WEST, SHOWING PORTAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. WEST PORTAL AND DECK VIEW, FROM WEST, SHOWING PORTAL CONFIGURATION AND LATERAL BRACING, STEEL MESH FLOOR, AND METAL RAILINGS - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  2. 8. EAST PORTAL AND DECK VIEW, FROM EAST, SHOWING PORTAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. EAST PORTAL AND DECK VIEW, FROM EAST, SHOWING PORTAL CONFIGURATION AND LATERAL BRACING, STEEL MESH FLOOR, METAL RAILINGS, AND PORTION OF EAST APPROACH - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  3. 4. LOOKING SOUTHWEST AT LATTICED GUARDRAIL, DIAGONALS, ASPHALT DECK AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. LOOKING SOUTHWEST AT LATTICED GUARDRAIL, DIAGONALS, ASPHALT DECK AND LACED ANGLES ON VERTICALS - Wayne County Bridge No. 122, Spanning West Fork Whitewater River at Main Street, Milton, Wayne County, IN

  4. Deck view, west approach; former Western Pacific (now Union Pacific) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Deck view, west approach; former Western Pacific (now Union Pacific) Railroad at left; wind turbine generators atop hill in background; view to northeast; 90mm lens - Carroll Overhead Bridge, Altamont Pass Road, Livermore, Alameda County, CA

  5. Deck view, east approach; intersection of Carroll Road at left; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Deck view, east approach; intersection of Carroll Road at left; Interstate Highway 5 viaduct in background; view to southwest; 90mm lens - Carroll Overhead Bridge, Altamont Pass Road, Livermore, Alameda County, CA

  6. 6. DETAIL OF STEEL GUARDRAIL, CONCRETE CURB AND DECK EXPANSION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. DETAIL OF STEEL GUARDRAIL, CONCRETE CURB AND DECK EXPANSION JOINT, WITH DRY BED OF RIO PUERCO IN BACKGROUND. VIEW TO EAST. - Rio Puerco Bridge, Mainline Road, spanning Rio Puerco, Holbrook, Navajo County, AZ

  7. 20. DETAIL VIEW OF DECK SOFFIT AND EXPANSION JOINT, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. DETAIL VIEW OF DECK SOFFIT AND EXPANSION JOINT, LOOKING SOUTHWEST FROM NORTH ABUTMENT - Chili Bar Bridge, Spanning South Fork of American River at State Highway 193, Placerville, El Dorado County, CA

  8. BELOW DECK DETAIL FROM EAST BANK. NOTE WROUGHT IRON LOWER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    BELOW DECK DETAIL FROM EAST BANK. NOTE WROUGHT IRON LOWER CHORD TENSION MEMBERS - Honey Run Bridge, Spanning Butte Creek, bypassed section of Honey Run Road (originally Carr Hill Road), Paradise, Butte County, CA

  9. 20. WEB / DECK / LATERAL BRACING DETAIL OF THROUGH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. WEB / DECK / LATERAL BRACING DETAIL OF THROUGH TRUSSES. VIEW TO WEST. - Abraham Lincoln Memorial Bridge, Spanning Missouri River on Highway 30 between Nebraska & Iowa, Blair, Washington County, NE

  10. 22. INCLINED END POST / DECK / GUARDRAIL DETAIL OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. INCLINED END POST / DECK / GUARDRAIL DETAIL OF THROUGH TRUSSES. VIEW TO SOUTHEAST. - Abraham Lincoln Memorial Bridge, Spanning Missouri River on Highway 30 between Nebraska & Iowa, Blair, Washington County, NE

  11. 2. GENERAL VIEW, FROM DECK, SHOWING THREE OF FOUR TOWERS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. GENERAL VIEW, FROM DECK, SHOWING THREE OF FOUR TOWERS - Jones Beach State Parkway Channel Bascule Bridge MP-3, Route 908 E, spanning Sloop Channel Southeast of East Bay, Hempstead, Nassau County, NY

  12. 28. VIEW EAST FROM DECKING ON SOUTHWEST CORNER OF PIVOT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. VIEW EAST FROM DECKING ON SOUTHWEST CORNER OF PIVOT PIER, DRIVE SYSTEM FOR SWING-SPAN INCLUDES: (from left to right) ELECTRIC LINE FROM SHORE (bottom left), TRACK AND RAIL ON CONCRETE PIER, ELECTRIC MOTOR, GASOLINE MOTOR, SHAFTS TO WEDGE DRIVE CRANKS, WEDGE DRIVE DRIVE SHAFT, WEDGE DRIVE GEAR BOX, AND (on right) GEARING FOR MANUAL WEDGE DRIVE ACCESSED THROUGH BRIDGE DECK - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  13. Concrete Pavement Preservation

    E-print Network

    1 Concrete Pavement Preservation State DOTs and local agencies, engineering consultants, materials on the new Concrete Pavement Preservation Guide (2nd edition). A 1- to 1½-day workshop and related training materials on concrete pavement preservation have been developed under a cooperative agreement between the CP

  14. Reconstruction of a pavement geothermal deicing system

    SciTech Connect

    Lund, J.W.

    1999-03-01

    In 1948, US 97 in Klamath Falls, Oregon was routed over Esplanade Street to Main Street and through the downtown area. In order to widen the bridge across the US Bureau of Reclamation A Canal and to have the road cross under the Southern Pacific Railroad main north-south line, a new bridge and roadway were constructed at the beginning of this urban route. Because the approach and stop where this roadway intersected Alameda Ave (now Hwy 50 -- Eastside Bypass) caused problems with traffic getting traction in the winter on an adverse 8% grade, a geothermal experiment in pavement de-icing was incorporated into the project. A grid system within the pavement was connected to a nearby geothermal well using a downhole heat exchanger (DHE). The 419-foot well provided heat to a 50-50 ethylene glycol-water solution that ran through the grid system at about 50 gpm. This energy could provide a relatively snow free pavement at an outside temperature of {minus}10 F and snowfall up to 3 inches per hour, at a heat requirement of 41 Btu/hr/ft{sup 2}. Over time, the well temperature dropped from 143 to 98 F at the surface. The bridge and surface pavement, geothermal well, and associated equipment were modified. This paper describes the modifications.

  15. An experimental study on the unsteady vortices and turbulent flow structures around twin-box-girder bridge deck models with different

    E-print Network

    Hu, Hui

    energy in the gap region and the fluctuating pressures on the leeward box. The vortex dimensions). While the super-long-span bridges with TBG config- uration have better flutter performance (i.e., higher critical flutter speed than those with si

  16. Pavement evaluation and rehabilitation

    SciTech Connect

    Ali, N.A.; Khosla, N.P.; Johnson, E.G.; Hicks, R.G.; Uzan, J.

    1987-01-01

    The 20 papers in this report deal with the following areas: determination of layer moduli using a falling weight deflectometer; evaluation of effect of uncrushed base layers on pavement performance; the effect of contact area shape and pressure distribution on multilayer systems response; sensitivity analysis of selected backcalculation procedures; performance of a full-scale pavement design experiment in Jamaica; subsealing and load-transfer restoration; development of a demonstration prototype expert system for concrete pavement evaluation; numerical assessment of pavement test sections; development of a distress index and rehabilitation criteria for continuously reinforced concrete pavements using discriminant analysis; a mechanistic model for thermally induced reflection cracking of portland cement concrete pavement with reinforced asphalt concrete overlay; New Mexico study of interlayers used in reflective crack control; status of the South Dakota profilometer; incorporating the effects of tread pattern in a dynamic tire excitation mechanism; external methods for evaluating shock absorbers for road-roughness measurements; factor analysis of pavement distresses for surface condition predictions; development of a utility evaluation for nondestructive-testing equipment used on asphalt-concrete pavements; estimating the life of asphalt overlays using long-term pavement performance data; present serviceability-roughness correlations using rating panel data; video image distress analysis technique for Idaho transportation department pavement-management system; acceptability of shock absorbers for road roughness-measuring trailers.

  17. STATUS OF POROUS PAVEMENT RESEARCH

    EPA Science Inventory

    This paper discusses the U.S. Environmental Protection Agency's porous pavement research program along with the economics, advantages, potential applications, and status and future research needs of porous pavements. Porous pavements are an available stormwater management techniq...

  18. Pavement condition data analysis

    SciTech Connect

    Zaniewski, J.P.; Hudson, S.W.; Hudson, W.R.

    1987-07-01

    This paper describes a computer methodology for analyzing pavement condition data to define inputs for pavement management systems. This system of programs was developed during a Federal Highway Administration research project. In the project, eight state highway departments were studied to determine the types of pavement condition data collected, procedures used for collecting data, the inputs to the states' pavement management systems, and computer programs used by the states to analyze raw pavement condition data. Several of the programs were assembled into the Method for Analyzing Pavement Condition, MAPCON, during a project performed at Pennsylvania State University. These and other existing or new programs (a total of 18) were identified, tested, modified, and incorporated onto a MS/DOS microcomputer system. MAPCON guides the user through selection of analysis method, raw data entry, and data analysis.

  19. 11. Short subways led to the lower deck of the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Short subways led to the lower deck of the Detroit-Superior Bridge. Street cars entered the subways through open wells located in the center of the roadways. This undated photograph shows the Superior Avenue entrance. The view is looking west. Photograph courtesy Office of the Cuyahoga County Engineer in Cleveland, Ohio. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

  20. Small-format fly-over photography for highway bridge monitoring

    NASA Astrophysics Data System (ADS)

    Chen, Shen-En; Rice, Corey; Boyle, Chuck; Hauser, Edd; Philbrick, Brian

    2010-04-01

    Current bridge visual inspections are time-consuming, subjective, and rely heavily on personal experiences. The resulting ratings may be inconsistent. This paper discusses using remote-sensing technologies for bridge assessment, specifically, the use of high-resolution aerial imagery. The Small-Format Aerial Photography (SFAP) is a low-cost solution for bridge surface imaging. Providing top-down views, the airplanes flying at 1000 ft, can allow visualization of sub-inch (< 0.5 inch) cracks and joint openings on bridge decks or highway pavements. However, the site lighting may influence the quality of the images; surrounding tree shades and the highway wear surface reflectivity. Several examples of bridge evaluation using SFAP aerial photography are presented to demonstrate the capability of remote sensing as an effective tool for bridge construction monitoring and condition assessment. Several imaging issues are raised about analytical techniques that are necessary to ensure proper quantification of bridge problems, which include crack detection, movement determination, heavy trucking assessment, debris detection, channel width determination and environment assessment.

  1. Asphalt in Pavement Maintenance.

    ERIC Educational Resources Information Center

    Asphalt Inst., College Park, MD.

    Maintenance methods that can be used equally well in all regions of the country have been developed for the use of asphalt in pavement maintenance. Specific information covering methods, equipment and terminology that applies to the use of asphalt in the maintenance of all types of pavement structures, including shoulders, is provided. In many…

  2. Pavement management practices. Final report

    SciTech Connect

    Peterson, D.E.

    1987-11-01

    This synthesis will be of interest to pavement designers, maintenance engineers, and others responsible for the management of highway pavements. Information is presented on pavement management systems - the established, documented procedures used to treat all activities involved in providing and sustaining pavements in an acceptable condition. As highway agencies focus more attention on maintenance and rehabilitation of highway networks, the use of some form of a pavement management system becomes increasingly important. This report of the Transportation Research Board describes the features, applicability, and used of a pavement management system and recommends five general steps for implementing a new pavement management system or improving an existing system.

  3. Future Flight Decks

    NASA Technical Reports Server (NTRS)

    Arbuckle, P. Douglas; Abbott, Kathy H.; Abbott, Terence S.; Schutte, Paul C.

    1998-01-01

    The evolution of commercial transport flight deck configurations over the past 20-30 years and expected future developments are described. Key factors in the aviation environment are identified that the authors expect will significantly affect flight deck designers. One of these is the requirement for commercial aviation accident rate reduction, which is probably required if global commercial aviation is to grow as projected. Other factors include the growing incrementalism in flight deck implementation, definition of future airspace operations, and expectations of a future pilot corps that will have grown up with computers. Future flight deck developments are extrapolated from observable factors in the aviation environment, recent research results in the area of pilot-centered flight deck systems, and by considering expected advances in technology that are being driven by other than aviation requirements. The authors hypothesize that revolutionary flight deck configuration changes will be possible with development of human-centered flight deck design methodologies that take full advantage of commercial and/or entertainment-driven technologies.

  4. Millimeter-wave nondestructive evaluation of pavement conditions

    NASA Astrophysics Data System (ADS)

    Vines-Cavanau, David; Busuioc, Dan; Birken, Ralf; Wang, Ming

    2012-04-01

    The United States is suffering from an aging civil infrastructure crisis. Key to recovery are rapid inspection technologies like that being investigated by the VOTERS project (Versatile Onboard Traffic Embedded Roaming Sensors), which aims to outfit ordinary road vehicles with compact low-cost hardware that enables them to rapidly assess and report the condition of roadways and bridge decks free of driver interaction. A key piece of hardware, and the focus of this paper, is a 24 GHz millimeter-wave radar system that measures the reflectivity of pavement surfaces. To account for the variability of real-world driving, such as changes in height, angle, speed, and temperature, a sensor fusion approach is used that corrects MWR measurements based on data from four additional sensors. The corrected MWR measurements are expected to be useful for various characterization applications, including: material type; deterioration such as cracks and potholes; and surface coverage conditions such as dry, wet, oil, water, and ice. Success at each of these applications is an important step towards achieving the VOTERS objective, however, this paper focuses on surface coverage, as whatever covers the driving surface will be most apparent to the MWR sensor and if not accounted for could significantly limit the accuracy of other applications. Contributions of the paper include findings from static lab tests, which validate the approach and show the effects of height and angle. Further contributions come from lab and in-field dynamic tests, which show the effects of speed and demonstrate that the MWR approach is accurate under city driving conditions.

  5. Pervious Pavement System Evaluation

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, grade...

  6. 12. MAIN DECK, VIEW FROM NEAR POOP DECK. VIEW FORWARD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. MAIN DECK, VIEW FROM NEAR POOP DECK. VIEW FORWARD OF MIDSHIP AREA WITH MASTS AND FIVE PORT OIL TANK HATCHES SEEN AT LEFT. - Ship "Falls of Clyde", Hawaii Maritime Center,Pier 7, Honolulu, Honolulu County, HI

  7. Boeing flight deck design philosophy

    NASA Technical Reports Server (NTRS)

    Stoll, Harty

    1990-01-01

    Information relative to Boeing flight deck design philosophy is given in viewgraph form. Flight deck design rules, design considerations, functions allocated to the crew, redundancy and automation concerns, and examples of accident data that were reviewed are listed.

  8. 31. DECK / VERTICAL / UPPER CHORD DETAIL OF THROUGH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. DECK / VERTICAL / UPPER CHORD DETAIL OF THROUGH TRUSS AT PIN-CONNECTED EXPANSION JOINT BETWEEN CANTILEVER ARM AND SUSPENDED SPAN. VIEW TO NORTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  9. 18. DETAIL VIEW OF MOVABLE SPAN UNDER GRID DECK, ONE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. DETAIL VIEW OF MOVABLE SPAN UNDER GRID DECK, ONE OF TWO DRIVE GEARS ON NORTH SIDE OF PEDESTAL THAT MESHES INTO FIXED GEAR RING, SET INTO TOP OF CENTER CONCRETE PEDESTAL, LOOKING SOUTHEAST (taken in March 1984) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  10. 22. View is from the deck, looking down to the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. View is from the deck, looking down to the junction of the last pony truss and the first through truss. This shows how the respective end posts are embedded into the concrete pier extension. There are only two of these, located on each end of pier #6. - Weidemeyer Bridge, Spanning Thomes Creek at Rawson Road, Corning, Tehama County, CA

  11. High altitude premium pavements

    NASA Astrophysics Data System (ADS)

    Abel, F.; Proctor, J.

    1980-02-01

    The effect on performance that various additives and, or compaction had on the performance of pavements was evaluated. The following additives were evaluated: Anti-stripping additives, ground scrap rubber and carbon black. Samples were also evaluated at approximately 0, 3, 10 and 15% voids to determine the effect compaction had on the performance of the pavement. The resilient modulus, effect of water on cohesion of compacted bituminous mixtures and an accelerated moisture damage test was performed on each design mix. Most of the additives did not show significant, if any, improvement in the laboratory test results. The best improvement in laboratory test results came from the anti-stripping asphalt additives, which is one of the least costly and simplest to include in the pavement mixture.

  12. Pervious Pavement System Evaluation

    EPA Science Inventory

    Pervious pavement is a low impact development stormwater control. The Urban Watershed Management Branch of the U.S. Environmental Protection Agency in Edison, NJ, is evaluating concrete pavers as a popular implementation. The pollutant removal of a bench-scale permeable interlo...

  13. PAVEMENT RECYCLING Description

    E-print Network

    PAVEMENT RECYCLING Description Major reconstruction projects can cause a significant amount recycling can significantly reduce construction time and cost by using the existing road structure as part its suitability for recycling. This involves a combination of both nondestructive testing and limited

  14. The Bump at the End of the Railway Bridge 

    E-print Network

    Nicks, Jennifer Elizabeth

    2011-02-22

    .............................................................................. 205 7.6.1 Bump Results ........................................................................ 206 7.6.2 Dip Results ............................................................................ 206 7.6.3 Summary... ........................................................................... 213 7.61 DBF vs. bridge deck type ........................................................................... 214 7.62 DSF vs. bridge deck type ........................................................................... 214 7.63 Ballast...

  15. Soil on Phoenix Deck

    NASA Technical Reports Server (NTRS)

    2008-01-01

    This image, taken by the Surface Stereo Imager (SSI) of NASA's Phoenix Lander, shows Martian soil piled on top of the spacecraft's deck and some of its instruments. Visible in the upper-left portion of the image are several wet chemistry cells of the lander's Microscopy, Electrochemistry, and Conductivity Analyzer (MECA). The instrument on the lower right of the image is the Thermal and Evolved-Gas Analyzer. The excess sample delivered to the MECA's sample stage can be seen on the deck in the lower left portion of the image.

    This image was taken on Martian day, or sol, 142, on Saturday, Oct. 19, 2008. Phoenix landed on Mars' northern plains on May 25, 2008.

    The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

  16. POROUS PAVEMENT: RESEARCH; DEVELOPMENT; AND DEMONSTRATION

    EPA Science Inventory

    This paper discusses the U.S. Environmental Protection Agency's porous pavement research program along with the economics, advantages, potential applications, and status and future research needs of porous pavements. Porous pavements are an available stormwater management techniq...

  17. Loose Canons on Deck 

    E-print Network

    2012-12-24

    /plain; charset=UTF-8 Posted originally on the Archive of Our Own at http://archiveofourown.org/works/592681. Rating: General Audiences Archive Warning: No Archive Warnings Apply Category: Gen Fandom: Mina de Malfois Character: Mina de Malfois... - Character, Josh Amos Additional Tags: Fandom Stats: Published: 2012-12-14 Words: 4215 Loose Canons on Deck by Kadorienne Summary Josh has been flooding fandom with old paper 'zine fics, and Mina is suspected of pseuicide. Notes Thank you to Grey Bard...

  18. Designing Flight Deck Procedures

    NASA Technical Reports Server (NTRS)

    Degani, Asaf; Wiener, Earl

    2005-01-01

    Three reports address the design of flight-deck procedures and various aspects of human interaction with cockpit systems that have direct impact on flight safety. One report, On the Typography of Flight- Deck Documentation, discusses basic research about typography and the kind of information needed by designers of flight deck documentation. Flight crews reading poorly designed documentation may easily overlook a crucial item on the checklist. The report surveys and summarizes the available literature regarding the design and typographical aspects of printed material. It focuses on typographical factors such as proper typefaces, character height, use of lower- and upper-case characters, line length, and spacing. Graphical aspects such as layout, color coding, fonts, and character contrast are discussed; and several cockpit conditions such as lighting levels and glare are addressed, as well as usage factors such as angular alignment, paper quality, and colors. Most of the insights and recommendations discussed in this report are transferable to paperless cockpit systems of the future and computer-based procedure displays (e.g., "electronic flight bag") in aerospace systems and similar systems that are used in other industries such as medical, nuclear systems, maritime operations, and military systems.

  19. M362K Second Midterm Exam. March 12, 2004 Problem 1. Bridge

    E-print Network

    Voloch, Felipe

    M362K Second Midterm Exam. March 12, 2004 Problem 1. Bridge A bridge hand consists of 13 cards from a standard 52 card deck. a) How many bridge hands contain exactly five spades? b) How many bridge hands contain all 4 aces? c) How many bridge hands contain exactly 5 spades and all 4 aces? d) How many bridge

  20. Pavement performance equations. Final report

    SciTech Connect

    Mahoney, J.P.; Kay, R.K.; Jackson, N.C.

    1988-03-01

    The WSDOT PMS data base was used to develop regression equations for three pavement surface types: bituminous surface treatments, asphalt concrete, and portland-cement concrete. The primary regression equations developed were to predict Pavement Condition Rating (PCR) which is a measure of the pavement surface distress (ranges from 100 (no distress) to below 0 (extensive distress)). Overall, the equations fit the data rather well given the expected variation of pavement performance information. The relative effects of age (time since construction or reconstruction) were illustrated for the three surface types.

  1. General outlook of pavement and vehicle dynamics

    SciTech Connect

    Mamlouk, M.S.

    1997-11-01

    The interaction between vehicle and pavement is complex since pavement roughness excites the dynamic forces generated by vehicles, while these dynamic forces simultaneously increase the pavement roughness. The objective of this paper is to provide an overview of the results of recent research related to pavement and vehicle dynamics and their interaction and to evaluate their potential use in the design and management of pavements. Pavement dynamic models are capable of determining stresses, strains, and deflections in various directions when harmonic, pulse, or transient loads are applied. Vehicle dynamic models simulate the effect of pavement roughness on the inertia of various vehicle components. These models can predict the dynamic forces produced by different axles and wheels of traveling vehicles at different locations along the pavement. Pavement response computed using dynamic models matches field measurements closer than those computed using static models. The concept of vehicle-pavement interaction can be applied to weigh-in-motion, pavement design and performance, and vehicle regulations.

  2. 10. DECK VIEW FORWARD FROM MAIN DECK TO FORECASTLE. NOTE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DECK VIEW FORWARD FROM MAIN DECK TO FORECASTLE. NOTE PIPE FITTING FOR OIL PUMPING SYSTEM (DISCHARGE). THE HATCH OPENINGS TO RIGHT ARE ABOVE THE SHIP'S BOILER ROOM. - Ship "Falls of Clyde", Hawaii Maritime Center,Pier 7, Honolulu, Honolulu County, HI

  3. 13. Looking north, from the southern approach to the bridge. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Looking north, from the southern approach to the bridge. The bridge deck, which is concrete with several patch coats of asphalt (now chiefly gravel and some turf), demonstrates a sharp gradient from the abutment to the bridge center line. - Vigo County Bridge No. 139, Spanning Sugar Creek at Seventy-fourth Place, Terre Haute, Vigo County, IN

  4. Appendix A-1 A Gallery of Truss Bridges

    E-print Network

    Bowen, James D.

    APPENDIX A Appendix A-1 A A Gallery of Truss Bridges Appendix A Description The Gallery of Truss Bridges is a collection of photographs showing thirty truss bridges from all over the United States. Also note whether each bridge is a through truss, deck truss, or pony truss. (Learning Activity #1) n

  5. View to southwest along bridge alignment, showing reverse curve from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View to southwest along bridge alignment, showing reverse curve from near deck level; Southern Pacific Railroad track passing beneath bridge; Western Pacific Railroad track out of sight behind bridge; photographer unknown; 1933 photo from collection of Office of Structures Maintenance, California Department of Transportation, Sacramento - Carroll Overhead Bridge, Altamont Pass Road, Livermore, Alameda County, CA

  6. PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway)

    E-print Network

    PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway) Effective portland cement concrete for special applications to composite pavements as shown and described. Constructing the Jointed Plain Ternary Cement Concrete Pavement layer of the composite pavement on a prepared

  7. Geotextiles in Flexible Pavement Construction

    ERIC Educational Resources Information Center

    Alungbe, Gabriel D.

    2004-01-01

    People everywhere in the developed world regularly drive on paved roads. Learning about the construction techniques and materials used in paving benefits technology and construction students. This article discusses the use of geosynthetic textiles in pavement construction. It presents background on pavements and describes geotextiles and drainage…

  8. Recommended Practice for Accepting New Concrete Pavement

    E-print Network

    Recommended Practice for Accepting New Concrete Pavement Surfaces for Tire/Pavement Noise Designation: CPSCP PP 1-11 (rev 3/1/2011) National Concrete Pavement Technology Center 2711 South Loop Drive, Suite 4700 Ames, IA 50010 #12;PP 1-1 CPSCP Recommended Practice for Accepting New Concrete Pavement

  9. Summary of Concrete Overlays Existing concrete pavement

    E-print Network

    Summary of Concrete Overlays Existing concrete pavement with surface distresses Prepared surface Monolithic pavement with new concrete surface Existing asphalt pavement with surface distresses Milled pavement with asphalt surface distresses Milled and cleaned surface New 2­5 in. (5.1­12.7 cm) bonded

  10. Demonstration of dual-band infrared thermal imaging at Grass Valley Creek bridges

    SciTech Connect

    Del Grande, N. K.; Durbin, P.F.; Logan, C.M.; Perkins, D.E.; Schich, P.C.

    1996-11-01

    We demonstrated dual-band infrared (DBIR) thermal imaging at the Grass Valley Creek Bridges near Redding CA. DBIR thermal imaging is an enabling technology for rapid, reliable, bridge deck inspections while minimizing lane closures. bridge-deck inspections were conducted from a mobile DBIR bridge inspection laboratory during November 2-3, 1995. We drove this self-contained unit at limited highway speeds over 0.4 lane miles of bridge deck. Using two thermal IR bands, we distinguished delaminations from clutter. Clutter, or unwanted thermal detail, occurs from foreign materials or uneven shade on the bridge deck surface. By mapping the DBIR spectral- response differences at 3-5 {mu}m and 8-12 {mu}m, we removed foreign material clutter. By mapping the deck diurnal thermal inertia variations, we removed clutter from uneven shade. Thermal inertia is a bulk deck property, the square root of thermal conductivity x density x heat capacity. Delaminated decks have below-average thermal inertias, or above-average day-night temperature excursions. Compared to normal decks areas, delaminated deck areas were typically 2 or 3 {degrees}C warmer at noon, and 0.5{degrees}C cooler at night. The mobile DBIR bridge inspection laboratory is currently undergoing extensive testing to examine bridges by the Federal Highway Administration.

  11. Pavement recycling. Executive summary and report

    SciTech Connect

    1995-10-01

    The Federal Highway Administration (FHWA) initiated Demonstration Project 39 (DP 39) Recycling Asphalt Pavements in June 1976. The project showed that asphalt pavement recycling was a technically viable rehabitation technique, and it was estimated that the use of reclaimed asphalt pavement (RAP) would amount to approximately 15 percent of the total hot-mix asphalt (HMA) production by the mid-1980s. It was expected that most of the asphalt pavement removed would be reused in new pavement construction or overlays.

  12. 27. VIEW NORTHWEST FROM DECKING ON SOUTHEAST CORNER OF PIVOT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. VIEW NORTHWEST FROM DECKING ON SOUTHEAST CORNER OF PIVOT PIER, DRIVE SYSTEM FOR SWING-SPAN INCLUDES: (from left to right) WEDGE DRIVE GEAR BOX, SHAFTS TO WEDGE DRIVE DRIVE, WEDGE DRIVE CRANK SHAFTS, ELECTRIC MOTOR, INTERNATIONAL HARVESTER GASOLINE ENGINE, CONTROL RODS FOR STARTING AND CHOKING ENGINE, PIVOT (bottom center), AND TRACK ON CONCRETE PIER - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  13. Toward an Improved Model of Asphalt Binder Oxidation in Pavements 

    E-print Network

    Prapaitrakul, Nikornpon

    2011-02-22

    Asphalt binder oxidation in pavements has been proven to be an ongoing process throughout a pavement's service life. Understanding the nature of the oxidation process is a critical step toward better pavement design to achieve greater pavement...

  14. Pavement Design TTP Orientation Seminar

    E-print Network

    Handy, Susan L.

    in contact with the earth's surface built to facilitate movement of people and goods ­Pedestrians ­Personal or concrete layers, open granular layers, on uncompacted subgrade #12;What are Pavements? #12;What

  15. Pervious Pavement System Evaluation- Abstract

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, gra...

  16. Adaptive prediction of pavement performance 

    E-print Network

    Zulyaminayn, Mohammed

    2002-01-01

    A Visual Basic 6.0[TM] computer program for adjusting family performance curves in making reasonable predictions of individual pavement section performance has been developed under this study. The methodology formulated ...

  17. Patch detection for pavement assessment

    E-print Network

    Radopoulou, Stefania C.; Brilakis, Ioannis

    2015-03-21

    Pavement management systems rely on comprehensive up-to-date road condition data to provide effective decision support for short, medium and long term maintenance scheduling. However, the cost per mile of the existing condition data collection...

  18. A three dimensional approach for tracking cracks in bridges using GPR

    NASA Astrophysics Data System (ADS)

    Benedetto, Andrea

    2013-10-01

    Corrosion associated with reinforcing bars is the most significant contributor to bridge deficiencies. The corrosion is usually caused by moisture and chloride ion exposure. The reinforcing bars are attacked by corrosion and yield expansive corrosion products. These oxidation products occupy a larger volume than the original intact steel and internal expansive stresses lead to cracking and debonding. There are some conventional inspection methods for the detection of the reinforcing bar's corrosion but they can be invasive and destructive, often laborious, and lane closure is required and it is difficult or unreliable for any quantification of corrosion. For these reasons, bridge engineers always prefer more to use the ground penetrating radar (GPR) technique. In this work a novel numerical approach for three dimensional tracking and mapping of cracks in the bridge is proposed. The work starts from some interesting results based on the use of the 3D imaging technique in order to improve the potentiality of the GPR to detect voids, cracks or buried objects. The numerical approach has been tested on data acquired on a bridge by using a pulse GPR system specifically designed for bridge deck and pavement inspection. The equipment integrates two arrays of Ultra Wide Band ground coupled antennas, having a main working frequency of 2 GHz. The two arrays are using antennas arranged with a different polarization. The cracks, associated often to moisture increase and higher values of the dielectric constant, produce a not negligible increase of the signal amplitude. Following this, the algorithm, organized in preprocessing, processing and postprocessing stages, analyzes the signal by comparing the value of the amplitude all over the domain of the radar scan.

  19. On the typography of flight-deck documentation

    NASA Technical Reports Server (NTRS)

    Degani, Asaf

    1992-01-01

    Many types of paper documentation are employed on the flight-deck. They range from a simple checklist card to a bulky Aircraft Flight Manual (AFM). Some of these documentations have typographical and graphical deficiencies; yet, many cockpit tasks such as conducting checklists, way-point entry, limitations and performance calculations, and many more, require the use of these documents. Moreover, during emergency and abnormal situations, the flight crews' effectiveness in combating the situation is highly dependent on such documentation; accessing and reading procedures has a significant impact on flight safety. Although flight-deck documentation are an important (and sometimes critical) form of display in the modern cockpit, there is a dearth of information on how to effectively design these displays. The object of this report is to provide a summary of the available literature regarding the design and typographical aspects of printed matter. The report attempts 'to bridge' the gap between basic research about typography, and the kind of information needed by designers of flight-deck documentation. The report focuses on typographical factors such as type-faces, character height, use of lower- and upper-case characters, line length, and spacing. Some graphical aspects such as layout, color coding, fonts, and character contrast are also discussed. In addition, several aspects of cockpit reading conditions such as glare, angular alignment, and paper quality are addressed. Finally, a list of recommendations for the graphical design of flight-deck documentation is provided.

  20. UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. TRIPODAL PIPE TOWERS RESEMBLE CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE?S TOWERS PRIOR TO ENCASEMENT IN CONCRETE. NOTE COLLAPSED TRUSS IN RIVER. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  1. 1. General view of bridge looking north. This is the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. General view of bridge looking north. This is the only suspension bridge in Cleveland. It was designed by Wilbur J. Watson and Associates, Consulting Engineers. Sections of the Wooden deck are missing, and the bridge is no longer used. - Sidaway Avenue Footbridge, Jackowo & Garden Valley neighborhood Vicinity, Cleveland, Cuyahoga County, OH

  2. 23. General views of Moody Bridge, in descending order: 1) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. General views of Moody Bridge, in descending order: 1) the northern approach with a partial 'barrel shot', 2) partial view of southern approach detailing bridge decking, railing and portal bracing, and 3) an elevation view to the northeast showing timber piers and abutment of southern approach. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  3. 61. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE Ms. 14, 6 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    61. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE Ms. 14, 6 miles E to McLeod, 4.5 miles S on McLeod-Shuqualak road. Overall view of bridge, looking E along N side, from below deck level. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  4. UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRUSSED OBELISK TOWERS ON STONE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRUSSED OBELISK TOWERS ON STONE PIERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. 3/4 VIEW FROM BELOW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  5. Corrosion of steel reinforcement is undoubtedly a leading cause for deterioration of concrete bridges. Over the last few decades, this fact has led to the development of

    E-print Network

    . A comparison between flexural and punching shear design concepts for bridge decks is discussed. Test results of concrete bridges. Over the last few decades, this fact has led to the development of various technologies, high- strength steel as reinforcement for either new or replacement bridge decks. There is a need

  6. Asphalt Oxidation Kinetics and Pavement Oxidation Modeling 

    E-print Network

    Jin, Xin

    2012-07-16

    Most paved roads in the United States are surfaced with asphalt. These asphalt pavements suffer from fatigue cracking and thermal cracking, aggravated by the oxidation and hardening of asphalt. This negative impact of asphalt oxidation on pavement...

  7. Concrete Pavement Sustainability Sustainability Track Leadership

    E-print Network

    Track 13: Concrete Pavement Sustainability #12;Sustainability Track Leadership Committee Members Sprinkel Larry Sutter Leif Wathne David Weber #12;Sustainability Track Leadership Team Members Dale package for concrete pavement sustainability (initiated1/10) · A conference on sustainability of concrete

  8. Quantifying Evaporation in a Permeable Pavement System

    EPA Science Inventory

    Studies quantifying evaporation from permeable pavement systems are limited to a few laboratory studies and one field application. This research quantifies evaporation for a larger-scale field application by measuring the water balance from lined permeable pavement sections. Th...

  9. Pervious Pavement System Evaluation-Poster

    EPA Science Inventory

    Pervious pavement is a low impact development stormwater control. The Environmental Protection Agency's Urban Watershed Management Branch is evaluating interlocking concrete pavingstone pervious pavement systems. The pavingstones themselves are impermeable, but the spaces between...

  10. 17. LOOKING FROM DECK ABOVE MESS UP AT DECK ABOVE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. LOOKING FROM DECK ABOVE MESS UP AT DECK ABOVE CO'S STATEROOM. RECTANGULAR WINDOWS IS AT REAR OF PILOT HOUSE. TO RIGHT OF WINDOW IS TOP OF STAIRS TO STARBOARD WING OF FLYBRIDGE. AT EXTREME RIGHT IS ENGINE CONTROLS AND IN BACKGROUND IS COMPASS WITH COVER OVER IT. RIGHT EDGE OF THIS IMAGE IS SAME AS IMAGE 14, JUST OBSTRUCTED IN IMAGE 14 BY LIFE PRESERVER AND SEAT. - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

  11. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

  12. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

  13. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

  14. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

  15. Towards a multimodal Ouija Board for aircraft carrier deck operations

    E-print Network

    Acquah, Kojo (Kojo F.)

    2015-01-01

    In this thesis, I present DeckAssistant, a novel interface for planning aircraft carrier deck operations. DeckAssistant is an intelligent, multimodal aircraft carrier Ouija Board. DeckAssistant's design is inspired by ...

  16. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must...

  17. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on a...

  18. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on a...

  19. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on a...

  20. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must...

  1. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck...

  2. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must...

  3. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck...

  4. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on a...

  5. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck...

  6. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck...

  7. 46 CFR 178.430 - Drainage of well deck vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on a...

  8. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck...

  9. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must...

  10. of Concrete Pavements Joint PerformanCe

    E-print Network

    of Concrete Pavements Joint PerformanCe interim Guide for optimum JUNE 2012 #12;#12;Interim Guide for Optimum Joint Performance of Concrete Pavements i Technical Report Documentation Page 1. Report No. 2 for Optimum Joint Performance of Concrete Pavements September 2011 6. Performing Organization Code 7. Author

  11. Empirical Comparison of Statistical Pavement Performance Models

    E-print Network

    Empirical Comparison of Statistical Pavement Performance Models Chih-Yuan Chu1 and Pablo L. Durango-Cohen2 Abstract: We conduct an empirical comparison of nine representative statistical pavement of a common subset of pavements from the test over a two-year forecast horizon. Comparison of the models

  12. 23 CFR 661.47 - Can bridge maintenance be performed with IRRBP funds?

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Can bridge maintenance be performed with IRRBP funds... ENGINEERING AND TRAFFIC OPERATIONS INDIAN RESERVATION ROAD BRIDGE PROGRAM § 661.47 Can bridge maintenance be performed with IRRBP funds? No. Bridge maintenance repairs, e.g., guard rail repair, deck repairs, repair...

  13. 23 CFR 661.47 - Can bridge maintenance be performed with IRRBP funds?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 23 Highways 1 2011-04-01 2011-04-01 false Can bridge maintenance be performed with IRRBP funds... ENGINEERING AND TRAFFIC OPERATIONS INDIAN RESERVATION ROAD BRIDGE PROGRAM § 661.47 Can bridge maintenance be performed with IRRBP funds? No. Bridge maintenance repairs, e.g., guard rail repair, deck repairs, repair...

  14. 23 CFR 661.47 - Can bridge maintenance be performed with IRRBP funds?

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 23 Highways 1 2014-04-01 2014-04-01 false Can bridge maintenance be performed with IRRBP funds... ENGINEERING AND TRAFFIC OPERATIONS INDIAN RESERVATION ROAD BRIDGE PROGRAM § 661.47 Can bridge maintenance be performed with IRRBP funds? No. Bridge maintenance repairs, e.g., guard rail repair, deck repairs, repair...

  15. 23 CFR 661.47 - Can bridge maintenance be performed with IRRBP funds?

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 23 Highways 1 2012-04-01 2012-04-01 false Can bridge maintenance be performed with IRRBP funds... ENGINEERING AND TRAFFIC OPERATIONS INDIAN RESERVATION ROAD BRIDGE PROGRAM § 661.47 Can bridge maintenance be performed with IRRBP funds? No. Bridge maintenance repairs, e.g., guard rail repair, deck repairs, repair...

  16. Anatomy of Bridge Flutter: Some New Insights Xinzhong Chen, Ahsan Kareem

    E-print Network

    Kareem, Ahsan

    Anatomy of Bridge Flutter: Some New Insights Xinzhong Chen, Ahsan Kareem NatHaz Modeling Laboratory accuracy and effectiveness are demonstrated through a flutter analysis of a cable-stayed bridge and aerodynamics on bridge flutter, which helps in better tailoring of the bridge structural systems and deck

  17. 23 CFR 661.47 - Can bridge maintenance be performed with IRRBP funds?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Can bridge maintenance be performed with IRRBP funds... ENGINEERING AND TRAFFIC OPERATIONS INDIAN RESERVATION ROAD BRIDGE PROGRAM § 661.47 Can bridge maintenance be performed with IRRBP funds? No. Bridge maintenance repairs, e.g., guard rail repair, deck repairs, repair...

  18. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Deck lighting. 155.790 Section 155.790 ...Equipment, and Records § 155.790 Deck lighting. (a) A self-propelled vessel...between sunset and sunrise must have deck lighting that adequately illuminates—...

  19. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Deck lighting. 155.790 Section 155.790 ...Equipment, and Records § 155.790 Deck lighting. (a) A self-propelled vessel...between sunset and sunrise must have deck lighting that adequately illuminates—...

  20. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Deck lighting. 155.790 Section 155.790 ...Equipment, and Records § 155.790 Deck lighting. (a) A self-propelled vessel...between sunset and sunrise must have deck lighting that adequately illuminates—...

  1. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Deck lighting. 155.790 Section 155.790 ...Equipment, and Records § 155.790 Deck lighting. (a) A self-propelled vessel...between sunset and sunrise must have deck lighting that adequately illuminates—...

  2. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Deck lighting. 155.790 Section 155.790 ...Equipment, and Records § 155.790 Deck lighting. (a) A self-propelled vessel...between sunset and sunrise must have deck lighting that adequately illuminates—...

  3. Teaching Methodology of Flexible Pavement Materials and Pavement Systems

    ERIC Educational Resources Information Center

    Mehta, Yusuf; Najafi, Fazil

    2004-01-01

    Flexible pavement materials exhibit complex mechanical behavior, in the sense, that they not only show stress and temperature dependency but also are sensitive to moisture conditions. This complex behavior presents a great challenge to the faculty in bringing across the level of complexity and providing the concepts needed to understand them. The…

  4. Guide Specification for Highway Construction Texturing Concrete Pavement for

    E-print Network

    /Pavement Noise using Artificial Turf Drag Designation: CPSCP GS 2-11 (rev 3/1/2011) National Concrete Pavement for Highway Construction Texturing Concrete Pavement for Reduced Tire/Pavement Noise using Artificial Turf the concrete has attained its initial set. 3.2. Drag artificial turf longitudinally along the concrete pavement

  5. California DOT 1. Briefly summarize your current pavement smoothness requirements.

    E-print Network

    California DOT 1. Briefly summarize your current pavement smoothness requirements. For HMA pavement to OGFC placed on existing pavement not constructed under the same project. If concrete pavement is placed ordered. 39-1.12B Straightedge The top layer of HMA pavement must not vary from the lower edge of a12-foot

  6. Guide Specification for Highway Construction Texturing Concrete Pavement for

    E-print Network

    Guide Specification for Highway Construction Texturing Concrete Pavement for Reduced Tire/Pavement Noise using Diamond Grinding Designation: CPSCP GS 1-11 (rev 3/1/2011) National Concrete Pavement for Highway Construction Texturing Concrete Pavement for Reduced Tire/Pavement Noise using Diamond Grinding

  7. Concrete Pavement Surface Characteristics Program

    E-print Network

    : In Vehicle Standardized by SAE J1477 and ISO 5128 Same vehicle used for OBSI and In-Vehicle noise testingConcrete Pavement Surface Characteristics Program (CPSCP) #12;Texture Testing: RoboTex 2.0 Built #12;25 or 50 ft. Noise Testing: Wayside Controlled pass-by (CPB) measures noise "roadside" using test

  8. National Concrete Pavement Technology Center

    E-print Network

    site review · Walk through the evaluation process · Walk through the design phase · Attend pre Material and Pavement Testing Mobile Laboratory · With the concurrence of each State DOT, the CP Tech Center's Mobile Concrete Lab will be on-site during construction of the overlay demonstration projects

  9. Pavement Design TTP Orientation Seminar

    E-print Network

    Handy, Susan L.

    · Builder · Society ­Internal ­External #12;Pavement Life Cycle · Infrastructure Life Cycle ­Deployment soils and processed rock · Asphalt concrete is 85% aggregate by volume; 10% asphalt; some plastic on product life cycle and waste ­ Pneumatic tire loads and inflation pressures ­ Operating speeds

  10. The Concrete and Pavement Challenge

    ERIC Educational Resources Information Center

    Roman, Harry T.

    2012-01-01

    The modern world is characterized by the extensive use of concrete and asphalt pavement. Periodically, these materials are replaced and the old materials disposed of. In this challenge, students will be asked to develop ways to reuse the old materials. It is important for students to understand how concrete and asphalt are made and applied, as…

  11. Pavement Smoothness for Illinois DOT -Doug Dirks 1. Briefly summarize your current pavement smoothness requirements. See below.

    E-print Network

    Pavement Smoothness for Illinois DOT - Doug Dirks 1. Briefly summarize your current pavement? N/A Illinois has both standard specifications and a special provision for pavement smoothness-Depth HMA pavements, and PCC Pavements are all included in this special provision. http

  12. Nonlinear Finite Element Analysis of Critical Gusset Plates in the I-35W Bridge in Minnesota

    E-print Network

    Ballarini, Roberto

    of the bridge were constructed as a deck-truss bridge. Steel truss bridges such as the I-35W Bridge are a very common form for long-span bridges in the U.S. and worldwide. Until the event occurred, steel truss in the I-35W Bridge in Minnesota Minmao Liao1 ; Taichiro Okazaki, A.M.ASCE2 ; Roberto Ballarini, M.ASCE3

  13. 17. Baltimore through truss steel bridge (1905), built by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Baltimore through truss steel bridge (1905), built by the American Bridge Company. The bridge is 15 to 20 feet wide, with a wooden deck, and connects the Sullivan Machine Co. with the Foundry. The enclosed bridge in the background was constructed ca. 1920, and connects the Chain Machine Building with its power plant, foundry, and pattern shop. - Sullivan Machinery Company, Main Street between Pearl & Water Streets, Claremont, Sullivan County, NH

  14. 12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS FROM CROWN OF MID-CHANNEL PIER, PAIRED COLUMNS SUPPORTING DECK, ARCHED WINDOW RAILING, LOOKING WEST-NORTHWEST FROM EUREKA SOUTHERN RAILROAD BRIDGE. CABLES VISIBLE IN BACKGROUND ARE EARTHQUAKE RESTRAINERS RETROFITTED TO 1952 HIGHWAY BRIDGE, WHICH FUNCTIONED AS DESIGNED IN APRIL 1992 TEMBLOR - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

  15. 58. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE, 1884, Ms. 14, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    58. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE, 1884, Ms. 14, E 6.5 mi. to McLeod, 4.5 miles S on McLeod-Shuqualak road. Mahorner's bridge (1884). Lower panel point, west span. View is at right-angles to the bridge and from below deck level. show pin connection, floor beams, and stringers. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  16. UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRIPLE PIPE TOWERS, SHOWING HOWE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRIPLE PIPE TOWERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. NOTE THAT TOWER PIPES LIE IN ONE PLANE, UNLIKE TRIPODAL ARRANGEMENT AT CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  17. Rutting and drainage design methodology for a concrete block pavement 

    E-print Network

    Poduska, Daryl Jason

    1998-01-01

    Concrete block pavements (CBP) have historically been hics. used in low trafficked applications as an alternative to asphalt and concrete pavement because of their aesthetic quality. However, concrete block pavements have not been used for high...

  18. Bituminous pavement recycling Aravind K. and Animesh Das

    E-print Network

    Das, Animesh

    Bituminous pavement recycling Aravind K. and Animesh Das Department of Civil Engineering IIT Kanpur Introduction The bituminous pavement rehabilitation alternatives are mainly overlaying, recycling and reconstruction. In the recycling process the material from deteriorated pavement, known as reclaimed asphalt

  19. Sierra Blanca Ruidoso Airport (SRR) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Sierra Blanca Ruidoso Airport (SRR) Pavement Condition and Analysis Submitted to: Jane M. Lucero .................................................................................................................Skid Resistance 13 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 13 .................................Table 4. Predicted Pavement Conditions (PCI) Assuming

  20. Deming Municipal Airport (DMN) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Deming Municipal Airport (DMN) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP .................................................................................................................Skid Resistance 16 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 16 2 #12;...............Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance After

  1. Roswell International Air Center Airport (ROW) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Roswell International Air Center Airport (ROW) Pavement Condition and Analysis Submitted to: Jane M in December, 2009 18 .......................................4. Predicted Pavement Conditions Assuming No Maintenance 18 ...............Table 5. Predicted Pavement Conditions (PCI) Assuming no Maintenance After 2010

  2. Double Eagle II Airport (AEG) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Double Eagle II Airport (AEG) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP ...................................................................................................................FWD Analysis 11 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 11 .....................Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance 12

  3. Raton Municipal Airport (RTN) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Raton Municipal Airport (RTN) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP .................................................................................................................Skid Resistance 14 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 14 ...............Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance After 2007

  4. Belen Alexander Municipal Airport (E80) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Belen Alexander Municipal Airport (E80) Pavement Condition and Analysis Submitted to: Jane M ........................................................................................................................Skid Resistance 13 ...............................................3. Predicted Pavement Conditions Assuming No Maintenance 13 ..........Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance

  5. Clayton Municipal Airport (CAO) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Clayton Municipal Airport (CAO) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP .................................................................................................................Skid Resistance 13 .......................................3. Predicted Pavement Conditions Assuming No Maintenance 13 .....................Table 4. Predicted Pavement Conditions (PCI) Assuming no Maintenance 14

  6. Las Cruces International Airport (LRU) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Las Cruces International Airport (LRU) Pavement Condition and Analysis Submitted to: Jane M. Lucero ........................................................................................................3. Airport Maintenance 14 .......................................4. Predicted Pavement Conditions Assuming No Maintenance 14 ...............Table 4. Predicted Pavement Conditions (PCI) Assuming

  7. Moriarty Municipal Airport (0E0) Pavement Condition and Analysis

    E-print Network

    Cal, Mark P.

    Moriarty Municipal Airport (0E0) Pavement Condition and Analysis Submitted to: Jane M. Lucero, AICP Effect of Coal Tar Seal on PCI 13 .......................................4. Predicted Pavement Conditions Assuming No Maintenance 14 ...............Table 5. Predicted Pavement Conditions (PCI) Assuming

  8. Integrated Materials and Construction Practices (IMCP) for Concrete Pavement

    E-print Network

    Integrated Materials and Construction Practices (IMCP) for Concrete Pavement Workshop Participant Handbook Prepared for Prepared by Federal Highway Administration National Concrete Pavement Technology and Construction Practices for Concrete Pavements Workshop Participant Handbook--Front Matter i Technical Report

  9. 46 CFR 69.109 - Under-deck tonnage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... (1) If the tonnage deck runs in a continuous line from stem to stern, the line of the tonnage deck is the longitudinal line...deck. (2) If the tonnage deck runs at different levels from stem to stern, the line of the tonnage deck is the...

  10. Strength and deformation characteristics of pavements

    NASA Astrophysics Data System (ADS)

    Shook, J. F.; Kallas, B. F.; McCullough, B. F.; Taute, A.; Rada, G.; Witczak, M. W.; Heisey, J. S.; Stokoe, K. H.; Meyer, A. H.; Huffman, M. S.

    The Colorado experimental base project was a full-scale field experment constructed with various thicknesses of two full depth hot mix sand asphalt beans, one full depth asphalt concrete base, and one thickness of a standard design with untreated base and subbase layers. Relative thicknesses of one asphalt concrete base, two hot mix sand asphalt bases, and one standard design with untreated base and subbase required to give an equal level of pavement performance were determined. Certain measured properties of the pavement and the pavement components were related to observed levels of performance by using both empirical and theoretical models for pavement behavior.

  11. Generation mechanisms of tire-pavement noise

    NASA Astrophysics Data System (ADS)

    Dare, Tyler P.

    Tire-pavement noise is the dominant source of traffic noise at highway speeds. It is the result of a combination of several noise generation mechanisms, including tire carcass vibration and tread block vibration. Because multiple mechanisms are involved, it is difficult to predict the effects of changes in pavement parameters on tire-pavement noise. In this research, a set of experimental techniques were developed to decompose a measured tire-pavement noise spectrum into a set of constituent spectra relating to each generation mechanism. Three principal mechanisms were identified: treadband vibration, sidewall vibration, and tangential tread block vibration. By combining the constituent spectra associated with these mechanisms, it was possible to accurately predict the total tire-pavement noise spectrum. The constituent spectra were fit to tire-pavement noise data measured on asphalt and concrete pavements at highway speeds. It was found that the constituent spectra fit the measured data well, and a two-parameter model was developed to predict tire-pavement noise levels from pavement texture data.

  12. 15. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. 'Concrete Bridge Over Salt River, Port Kenyon, Humboldt County, California, A.J. Logan, County Surveyor, H.J. Brunnier, Consulting Engineer, March 7, 1919,' showing general plan, plan of top chord, elevation of main girder, transverse section, plan section at deck level. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

  13. 15. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING LONGITUDINAL STRINGERS SUPPORTING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING LONGITUDINAL STRINGERS SUPPORTING WOODEN DECK AND RESTING ON TRANSVERSE FLOOR BEAMS. DIAGONAL EYE BARS FOR REINFORCEMENT ARE SEEN AT CENTER; VIEW FROM SOUTH BANK. - Mitchell's Mill Bridge, Spanning Winter's Run on Carrs Mill Road, west of Bel Air, Bel Air, Harford County, MD

  14. 15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY HALES HOLDING HUGE KEY ABOVE HOLE IN DECK OF CENTER SWING SPAN TO REVEAL KEY BASETHE KEY IS SET UPON A MALE FITTING USED TO OPEN THE SPAN - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

  15. 30. VIEW OF BRIDGE, LOOKING NORTH TOWARD THE WALKWAY EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. VIEW OF BRIDGE, LOOKING NORTH TOWARD THE WALKWAY EAST ABUTMENT. THE HORIZONTAL CABLES RUN FROM THE ABUTMENT TO THE QUARTER POINT OF THE WALKWAY DECK. February 1987 - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  16. CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE, CIRCA 1896, SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE, CIRCA 1896, SHOWING INCLINED STAY CABLES EXTENDING FROM TOP OF TOWER TO DECK. 3/4 VIEW FROM BELOW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  17. UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING COMPLETED SINGLE PIPE TOWERS, WOODEN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING COMPLETED SINGLE PIPE TOWERS, WOODEN DECK LAID OVER LONGITUDINAL CABLES, AND WIRES READY FOR CABLE SPINNING. NOTE WORKER IN LEFT FOREGROUND STANDING IN ANCHORAGE PIT. BARREL VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  18. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

  19. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 7 2014-07-01 2014-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

  20. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

  1. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 7 2013-07-01 2013-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

  2. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

  3. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 7 2010-07-01 2010-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

  4. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 7 2012-07-01 2012-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

  5. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 7 2011-07-01 2011-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

  6. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

  7. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

  8. 46 CFR 69.111 - Between-deck tonnage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... complete deck runs in a continuous line from stem to stern, the line of the uppermost complete deck is the... different levels from stem to stern, the line of the uppermost complete deck is the longitudinal line of...

  9. 46 CFR 69.111 - Between-deck tonnage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... complete deck runs in a continuous line from stem to stern, the line of the uppermost complete deck is the... different levels from stem to stern, the line of the uppermost complete deck is the longitudinal line of...

  10. Pervious Pavement System Evaluation-Paper

    EPA Science Inventory

    The use of a pervious pavement can be effective as a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete paver systems as a type of porous pavement. Although the pavers are impermeable, the spaces between the pave...

  11. Analysis and design optimization of flexible pavement

    SciTech Connect

    Mamlouk, M.S.; Zaniewski, J.P.; He, W.

    2000-04-01

    A project-level optimization approach was developed to minimize total pavement cost within an analysis period. Using this approach, the designer is able to select the optimum initial pavement thickness, overlay thickness, and overlay timing. The model in this approach is capable of predicting both pavement performance and condition in terms of roughness, fatigue cracking, and rutting. The developed model combines the American Association of State Highway and Transportation Officials (AASHTO) design procedure and the mechanistic multilayer elastic solution. The Optimization for Pavement Analysis (OPA) computer program was developed using the prescribed approach. The OPA program incorporates the AASHTO equations, the multilayer elastic system ELSYM5 model, and the nonlinear dynamic programming optimization technique. The program is PC-based and can run in either a Windows 3.1 or a Windows 95 environment. Using the OPA program, a typical pavement section was analyzed under different traffic volumes and material properties. The optimum design strategy that produces the minimum total pavement cost in each case was determined. The initial construction cost, overlay cost, highway user cost, and total pavement cost were also calculated. The methodology developed during this research should lead to more cost-effective pavements for agencies adopting the recommended analysis methods.

  12. Controlled Rocking System for Seismic Retrofit of Steel Truss Bridge Piers

    E-print Network

    Bruneau, Michel

    1 Controlled Rocking System for Seismic Retrofit of Steel Truss Bridge Piers Michael Pollino1 existing steel truss bridges consist of riveted construction with built-up, lattice type members supporting a slab-on-girder bridge deck. Truss piers are typically in an x- or v-braced configuration. Steel truss

  13. An Application of Industrial Agents to Concrete Bridge Monitoring Sajjad Ahmad Madani Mihaela Ulieru

    E-print Network

    Ulieru, Mihaela

    sensor, delamination sensor, corrosion sensor, stress/strain sensors, humidity sensor, and crack sensor bridge deficiencies (Asce, 2005). Three main problems that deteriorate bridge decks are cracking delamination and corrosion. Once a bridge is affected by one of the aforementioned problems, it can always lead

  14. Evaluation of Multimode Coupled Bridge Response and Equivalent Static Wind Loading

    E-print Network

    Kareem, Ahsan

    is discussed with applications to bridge design. KEYWORDS: Flutter; Buffeting; Aeoelasticity; Aerodynamics-supported bridges leads to a concomitant decrease in their natural frequencies. Consequently, the reduced design wind velocity, which is defined as the ratio of design wind velocity to the bridge frequency and deck

  15. 26. Photocopy of 1968 repair drawing for 'WalpoleWestminster Bridge Over: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of 1968 repair drawing for 'Walpole-Westminster Bridge Over: Connecticut River', unattributed. (Filed with N.H. Department of Transportation, Bridge Design Division plan archives, Concord, N.H.) Sheet: Deck and Expansion Joint Details June 13, 1968 - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  16. Predicting pavement distress in oil field areas

    SciTech Connect

    Mason, J.M.; Scullion, T.; Stampley, B.E.

    1983-05-01

    A study on oil field traffic characteristics was performed and a procedure was developed for assessing current and future effects of oil field truck traffic on surface-treated (stage construction type) pavements. A computer program calculates several types of pavement distress and serviceability parameters to evaluate pavement performance under various axle load repetitions. Stepwise regression analysis of 132 surface-treated pavement sections led to the development of individual distress equations for rutting, raveling, flushing, alligator cracking, patching, longitudinal and transverse cracking, and failures (potholes). The versatility of the program provides a means of anticipating early pavement failures due to increased axle load repetitions. The program also provides the basic framework for computing the effects of other ''special-use'' truck traffic demands.

  17. Predicting pavement distress in oil field areas

    SciTech Connect

    Mason, J.M.; Scullion, T.; Stampley, B.E.

    1984-05-01

    A study on oil field traffic characteristics was performed and a procedure was developed for assessing current and future effects of oil field truck traffic on surface-treated (stage construction type) pavements. A computer program calculates several types of pavement distress and serviceability parameters to evaluate pavement performance under various axle load repetitions. Stepwise regression analysis of 132 surface-treated pavement sections led to the development of individual distress equations for rutting, raveling, flushing, alligator cracking, patching, longitudinal and transverse cracking, and failures (potholes). The versatility of the program provides a means of anticipating early pavement failures due to increased axle load repetitions. The program also provides the basic framework for computing the effects of other ''special-use'' truck traffic demands.

  18. SORPTIVITY-BASED SERVICE LIFE PREDICTIONS FOR CONCRETE PAVEMENTS

    E-print Network

    Bentz, Dale P.

    to predict the concrete pavement surface temperature and time-of-wetness history for a wide varietySORPTIVITY-BASED SERVICE LIFE PREDICTIONS FOR CONCRETE PAVEMENTS by Dale P. Bentz, Mark A. Ehlen Pavements. Proceedings, Volume 1. International Society for Concrete Pavements. September 9-13, 2001

  19. Alabama DOT 1. Briefly summarize your current pavement smoothness requirements.

    E-print Network

    Alabama DOT 1. Briefly summarize your current pavement smoothness requirements. Concrete pavement string applied parallel to the surface. The surface is checked 1' inside the edges of the pavement, consolidated and refinished. High areas shall be cut down and refinished. The pavement is also checked

  20. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Deck rails. 169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or lifelines must be at least 30 inches...

  1. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Deck rails. 169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or lifelines must be at least 30 inches...

  2. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Deck rails. 169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or lifelines must be at least 30 inches...

  3. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Deck rails. 169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or lifelines must be at least 30 inches...

  4. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Deck rails. 169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or lifelines must be at least 30 inches...

  5. 46 CFR 108.486 - Helicopter decks.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Helicopter decks. 108.486 Section 108.486 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Fire Extinguishing Systems Fire Protection for Helicopter Facilities § 108.486 Helicopter decks. At least two of the accesses to the...

  6. 46 CFR 177.900 - Deck rails.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... simultaneously. (c) Where space limitations make deck rails impractical for areas designed for crew use only.... (2) Rails on a vessel subject to the 1966 International Convention on Load Lines must be at least 1... installed between a top rail required by paragraph (a) of this section, and the deck so that no open...

  7. 46 CFR 177.900 - Deck rails.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... simultaneously. (c) Where space limitations make deck rails impractical for areas designed for crew use only.... (2) Rails on a vessel subject to the 1966 International Convention on Load Lines must be at least 1... installed between a top rail required by paragraph (a) of this section, and the deck so that no open...

  8. 46 CFR 177.900 - Deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... simultaneously. (c) Where space limitations make deck rails impractical for areas designed for crew use only.... (2) Rails on a vessel subject to the 1966 International Convention on Load Lines must be at least 1... installed between a top rail required by paragraph (a) of this section, and the deck so that no open...

  9. State DOT Representative Report Questions National Concrete Consortium

    E-print Network

    apply to your bridge deck surface? Belt Drag Longitudally if Spans are less than 40' in length, or Wet center to center. 10. How does your state handle transitions/approaches from pavement on to the bridge concrete pavement 7 in. per mile, Asphalt pavement must meet 30 in. per mile. 11. Does your state maintain

  10. A strange bridge by Leonardo

    E-print Network

    Huylebrouck, Dirk

    2013-01-01

    On folio 855 recto of the Codex Atlanticus, Leonardo da Vinci drew three 'easily movable' bridges, but one of them is enigmatic: all 'replicas' in Leonardo museums and exhibitions come as a surprise, to say the least, to any engineer or architect whose attention is drawn to it. This is the case for models in Amboise (France), Chicago and Portland (USA), Florence (Italy) and for the one of the traveling exhibition by the Australian company 'Grande Exhibitions' that already visited 40 major cities in the world. All 'replicas' of the bridge model attributed to Leonardo have pillars standing on the deck of the bridge, while the deck is suspended by cables attached on these pillars. At first sight this problem does not catch the attention of the observer, as the bridge seems to be a mixed form of a beam and a suspension bridge, but it was not overlooked by my colleague architect-engineer Dr. Laurens Luyten (Gent, Belgium). Yet, after a TV-interview in Brussels so much pressure was exerted by some of the museum col...

  11. Effects of temperature and water on pavement performance

    SciTech Connect

    Badu-Tweneboah, K.; Tia, M.; Ruth, B.E.; Richardson, J.M.; Armaghani, J.M.

    1987-01-01

    The 12 papers in the report deal with the following areas: procedures for estimation of asphalt-concrete pavement moduli at in-situ temperatures; stress caused by temperature gradient in portland-cement concrete pavements; characterizing temperature effects for pavement analysis and design; temperature response of concrete pavements; an examination of environmental versus load effects on pavements; moisture in portland-cement concrete; effect of rainfall on the performance of continuously reinforced concrete pavements in Texas; effect of moisture on the structural performance of a crushed-limestone road base; water-induced distress in flexible pavement in a wet tropical climate; an evaluation of design high-water clearances for pavements; economic impact of pavement subsurface drainage; use of open-graded, free-draining layers in pavement systems; a national synthesis report.

  12. Smart Suspension Systems for Bridge-Friendly Vehicles Yonghong Chena1

    E-print Network

    Tsao, Tsu-Chin

    , Deck irregularities, Magnetorheological (MR) damper 1. INTRODUCTION Highway bridges have suffered, the use of tuned mass damper [3] and magneto-rheological fluid damper [4, 5] has been examined as means

  13. Introduction to Concepts of Two-Dimensional Strain and Their Application With the Use of Card-Deck Models

    ERIC Educational Resources Information Center

    Ragan, Donal M.

    1969-01-01

    Describes the introduction of some fundamental concepts of strain in beginning structural geology courses through the use of "card-deck models. Suggests this technique as a bridge between the visual, but qualitative, and the mathematical aspects of these fundamental concepts. (BC)

  14. Effective flow resistivity of highway pavements.

    PubMed

    Rochat, Judith L; Read, David R

    2013-12-01

    In the case of highway traffic noise, propagating sound is influenced by the ground over which it travels, whether it is the pavement itself or the ground between the highway and nearby communities. Properly accounting for ground type in modeling can increase accuracy in noise impact determinations and noise abatement design. Pavement-specific effective flow resistivity values are being investigated for inclusion in the Federal Highway Administration Traffic Noise Model, which uses these values in the sound propagation algorithms and currently applies a single effective flow resistivity value to all pavement. Pavement-specific effective flow resistivity values were obtained by applying a modified version of the American National Standards Institute S1.18 standard. The data analysis process was tailored to allow for increased sensitivity and extraction of effective flow resistivity values for a broad range of pavements (sound absorptive to reflective). For porous pavements (sound absorptive), it was determined that examination of the measured data can reveal influence from an underlying structure. Use of such techniques can aid in the design of quieter pavements. PMID:25669283

  15. Modeling and experimental testing of a smart composite bridge

    NASA Astrophysics Data System (ADS)

    Chandrashekhara, K.; Nanni, Antonio; Watkins, Steve E.; Kumar, Prakash

    2003-10-01

    An all composite bridge with integral sensor network has been designed and built at the University of Missouri-Rolla (UMR). An extensive experimental study and finite element analysis were carried out to obtain and compare properties (stiffness, strength, failure modes) of 76 mm (3 in) square hollow pultruded Fiber Reinforced Polymer (FRP) tubes and their assemblies. Tube assemblies were used in the fabrication of bridge deck designed for H-20 truckloads as specified by the American Association of State Highway and Transportation Officials (AASHTO). The bridge is 9.14 m (30 ft) long and is 2.74 m (9 ft) wide. All the coupons were tested under three- or four-point bending. Experimental results show excellent linear elastic behavior up to failure and are in good agreement with finite element solutions. A quarter portion of the full-sized bridge deck was then tested for its structural performance under design and fatigue loading and also for ultimate load capacity to evaluate the bridge response. The characteristics of the full-size bridge deck were determined by analyzing the performed tests. The test sample showed almost no reduction in stiffness or strength after 2 million cycles of fatigue loading in excess of the design load. The bridge was installed at the UMR campus in July 2000. The bridge is equipped with fiber optic sensors, and the response of the bridge will be remotely monitored.

  16. Assessment of highway pavements using GPR

    NASA Astrophysics Data System (ADS)

    Plati, Christina; Loizos, Andreas

    2015-04-01

    Highway infrastructure is a prerequisite for a functioning economy and social life. Highways, often prone to congestion and disruption, are one of the aspects of a modern transport network that require maximum efficiency if an integrated transport network, and sustainable mobility, is to be achieved. Assessing the condition of highway structures, to plan subsequent maintenance, is essential to allow the long-term functioning of a road network. Optimizing the methods used for such assessment will lead to better information being obtained about the road and underlying ground conditions. The condition of highway structures will be affected by a number of factors, including the properties of the highway pavement, the supporting sub-base and the subgrade (natural ground), and the ability to obtain good information about the entire road structure, from pavement to subgrade, allows appropriate maintenance programs to be planned. The maintenance of highway pavements causes considerable cost and in many cases obstruction to traffic flow. In this situation, methods that provide information on the present condition of pavement structure non-destructively and economically are of great interest. It has been shown that Ground-Penetrating-Radar (GPR), which is a Non Destructive Technique (NDT), can deliver information that is useful for the planning of pavement maintenance activities. More specifically GPR is used by pavement engineers in order to determine physical properties and characteristics of the pavement structure, information that is valuable for the assessment of pavement condition. This work gives an overview on the practical application of GPR using examples from highway asphalt pavements monitoring. The presented individual applications of GPR pavement diagnostics concern structure homogeneity, thickness of pavement layers, dielectric properties of asphalt materials etc. It is worthwhile mentioning that a number of applications are standard procedures, either separately or in combination with other NDT methods, but even for them there is still a room for improvement and there is still need to set stricter regulations Comparisons between radar results and ground truth data produce evidence in support of the statement that the accuracy and reliability of radar results is sufficient for facing many issues related to the evaluation of asphalt pavements. Thus, benefits and limits of this method are shown and recommendations for GPR inspections are presented. Acknowledgments: This work benefited from networking activities carried out within the EU funded COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar."

  17. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  18. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  19. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  20. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  1. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  2. 46 CFR 178.410 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  3. 46 CFR 116.1110 - Drainage of flush deck vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

  4. 14 CFR 125.315 - Admission to flight deck.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Admission to flight deck. 125.315 Section... Admission to flight deck. (a) No person may admit any person to the flight deck of an airplane unless the... permission of the pilot in command. (b) No person may admit any person to the flight deck unless there is...

  5. 49 CFR 1544.237 - Flight deck privileges.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 9 2012-10-01 2012-10-01 false Flight deck privileges. 1544.237 Section 1544.237... COMMERCIAL OPERATORS Operations § 1544.237 Flight deck privileges. (a) For each aircraft that has a door to the flight deck, each aircraft operator must restrict access to the flight deck as provided in...

  6. 49 CFR 1544.237 - Flight deck privileges.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 9 2010-10-01 2010-10-01 false Flight deck privileges. 1544.237 Section 1544.237... COMMERCIAL OPERATORS Operations § 1544.237 Flight deck privileges. (a) For each aircraft that has a door to the flight deck, each aircraft operator must restrict access to the flight deck as provided in...

  7. 49 CFR 1544.237 - Flight deck privileges.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 9 2014-10-01 2014-10-01 false Flight deck privileges. 1544.237 Section 1544.237... COMMERCIAL OPERATORS Operations § 1544.237 Flight deck privileges. (a) For each aircraft that has a door to the flight deck, each aircraft operator must restrict access to the flight deck as provided in...

  8. 14 CFR 125.315 - Admission to flight deck.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Admission to flight deck. 125.315 Section... Admission to flight deck. (a) No person may admit any person to the flight deck of an airplane unless the... permission of the pilot in command. (b) No person may admit any person to the flight deck unless there is...

  9. 14 CFR 125.315 - Admission to flight deck.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Admission to flight deck. 125.315 Section... Admission to flight deck. (a) No person may admit any person to the flight deck of an airplane unless the... permission of the pilot in command. (b) No person may admit any person to the flight deck unless there is...

  10. 49 CFR 1544.237 - Flight deck privileges.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 9 2011-10-01 2011-10-01 false Flight deck privileges. 1544.237 Section 1544.237... COMMERCIAL OPERATORS Operations § 1544.237 Flight deck privileges. (a) For each aircraft that has a door to the flight deck, each aircraft operator must restrict access to the flight deck as provided in...

  11. 14 CFR 125.315 - Admission to flight deck.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Admission to flight deck. 125.315 Section... Admission to flight deck. (a) No person may admit any person to the flight deck of an airplane unless the... permission of the pilot in command. (b) No person may admit any person to the flight deck unless there is...

  12. 49 CFR 1544.237 - Flight deck privileges.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 9 2013-10-01 2013-10-01 false Flight deck privileges. 1544.237 Section 1544.237... COMMERCIAL OPERATORS Operations § 1544.237 Flight deck privileges. (a) For each aircraft that has a door to the flight deck, each aircraft operator must restrict access to the flight deck as provided in...

  13. Improvements to a Transport Model of Asphalt Binder Oxidation in Pavements: Pavement Temperature Modeling, Oxygen Diffusivity in Asphalt Binders and Mastics, and Pavement Air Void Characterization 

    E-print Network

    Han, Rongbin

    2012-07-16

    Although evidence is mounting that asphalt binder oxidizes in pavements, and that oxidation and subsequent hardening of asphalt binder has a profound effect on pavement durability, important implementation issues remain to be better understood...

  14. Calculations in bridge aeroelasticity via CFD

    SciTech Connect

    Brar, P.S.; Raul, R.; Scanlan, R.H.

    1996-12-31

    The central focus of the present study is the numerical calculation of flutter derivatives. These aeroelastic coefficients play an important role in determining the stability or instability of long, flexible structures under ambient wind loading. A class of Civil Engineering structures most susceptible to such an instability are long-span bridges of the cable-stayed or suspended-span variety. The disastrous collapse of the Tacoma Narrows suspension bridge in the recent past, due to a flutter instability, has been a big impetus in motivating studies in flutter of bridge decks.

  15. Pervious Pavement System Evaluation- Abstract 1

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, gra...

  16. The Edison Environmental Center Permeable Pavement Site

    EPA Science Inventory

    This a presentation for a Community Outreach Event called "Chemistry Works and Celebration of International Year of Chemistry." It will review the permeable pavement research project at the Edison Environmental center.

  17. Permeable Pavement Research - Edison, New Jersey

    EPA Science Inventory

    This presentation provides the background and summary of results collected at the permeable pavement parking lot monitored at the EPA facility in Edison, NJ. This parking lot is surfaced with permeable interlocking concrete pavers (PICP), pervious concrete, and porous asphalt. ...

  18. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... horizontal plane 3 feet above the deck the illumination must measure at least: (1) 5.0 foot candles at transfer connection points; and (2) 1.0 foot candle in transfer operations work areas. (c) Lighting must...

  19. 33 CFR 155.790 - Deck lighting.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... horizontal plane 3 feet above the deck the illumination must measure at least: (1) 5.0 foot candles at transfer connection points; and (2) 1.0 foot candle in transfer operations work areas. (c) Lighting must...

  20. 46 CFR 169.327 - Deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...169.327 Section 169.327 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Construction and Arrangement Rails and Guards § 169.327 Deck rails. (a) All rails or...

  1. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Hydraulic system for the Generic Flight Deck (GFD) Simulator located in the Cockpit Motion Facility. The hydraulics are a necessary component to perform a model test on simulator structures. Photographed in building 1268D.

  2. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Close up of the sensors for the Generic Flight Deck (GFD) Simulator located in the Cockpit Motion Facility. The sensors are a necessary component to perform a model test on simulator structures. Photographed in building 1268D.

  3. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Sensors for the Generic Flight Deck (GFD) Simulator located in the Cockpit Motion Facility. The sensors are a necessary component to perform a model test on simulator structures. Photographed in building 1268D.

  4. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The hydraulic valve system for the Generic Flight Deck (GFD) Simulator - located in the Cockpit Motion Facility. The hydraulics are necessary to perform a model test on simulator structures. Photographed in building 1268D.

  5. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    A sensor for the Generic Flight Deck (GFD) Simulator - located in the Cockpit Motion Facility. The sensors are necessary to perform a model test on simulator structures. Photographed in building 1268D.

  6. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Computers used for the Generic Flight Deck (GFD) Simulator - located in the Cockpit Motion Facility. The computer system is necessary to perform a model test on simulator structures. Photographed in building 1268D.

  7. CMF/Generic Flight Deck - model test

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The hydraulic system for the Generic Flight Deck (GFD) Simulator - located in the Cockpit Motion Facility. The hydraulics are necessary to perform a model test on simulator structures. Photographed in building 1268D.

  8. Definition of the 2005 flight deck environment

    NASA Technical Reports Server (NTRS)

    Alter, K. W.; Regal, D. M.

    1992-01-01

    A detailed description of the functional requirements necessary to complete any normal commercial flight or to handle any plausible abnormal situation is provided. This analysis is enhanced with an examination of possible future developments and constraints in the areas of air traffic organization and flight deck technologies (including new devices and procedures) which may influence the design of 2005 flight decks. This study includes a discussion on the importance of a systematic approach to identifying and solving flight deck information management issues, and a description of how the present work can be utilized as part of this approach. While the intent of this study was to investigate issues surrounding information management in 2005-era supersonic commercial transports, this document may be applicable to any research endeavor related to future flight deck system design in either supersonic or subsonic airplane development.

  9. Resource management on the flight deck. [conferences

    NASA Technical Reports Server (NTRS)

    Cooper, G. E. (editor); White, M. D. (editor); Lauber, J. K. (editor)

    1980-01-01

    Several approaches to the training and selection of aircrew are presented including both industry and nonindustry perspectives. Human factor aspects of the problem are also examined with specific emphasis on the psychology of the flight deck situation.

  10. Functional categories for future flight deck designs

    NASA Technical Reports Server (NTRS)

    Abbott, Terence S.

    1993-01-01

    With the addition of each new system on the flight deck, the danger of increasing overall operator workload while reducing crew understanding of critical mission information exists. The introduction of more powerful onboard computers, larger databases, and the increased use of electronic display media may lead to a situation of flight deck 'sophistication' at the expense of losses in flight crew capabilities and situational awareness. To counter this potentially negative impact of new technology, research activities are underway to reassess the flight deck design process. The fundamental premise of these activities is that a human-centered, systems-oriented approach to the development of advanced civil aircraft flight decks will be required for future designs to remain ergonomically sound and economically competitive. One of the initial steps in an integrated flight deck process is to define the primary flight deck functions needed to support the mission goals of the vehicle. This would allow the design team to evaluate candidate concepts in relation to their effectiveness in meeting the functional requirements. In addition, this would provide a framework to aid in categorizing and bookkeeping all of the activities that are required to be performed on the flight deck, not just activities of the crew or of a specific system. This could then allow for a better understanding and allocation of activities in the design, an understanding of the impact of a specific system on overall system performance, and an awareness of the total crew performance requirements for the design. One candidate set of functional categories that could be used to guide an advanced flight deck design are described.

  11. Reducing traffic noise with quieter pavements

    NASA Astrophysics Data System (ADS)

    Donavan, Paul

    2005-09-01

    In recent years, interest has increased in the use of pavement type to reduce traffic noise. This has been driven by public concern over noise from freeways and state transportation agencies' interest in using pavement instead of sound walls to mitigate traffic noise. Beginnings of the recent interest go back to 1998 with the formation of the Institute for Safe, Quiet & Durable Highways at Purdue University and the initiation long-term research by the California Department of Transportation (Caltrans) on the effectiveness of quieter pavements. In 2002, the State of Arizona announced plans to overlay 115 miles of concrete freeway in the greater Phoenix area with a quieter asphalt rubber surface. This turned into the first Quiet Pavement Pilot Program in partnership between Federal Highway Administration (FHWA) and the Arizona Department of Transportation. Since that time, the FHWA in cooperation with the American Association of State Highway Transportation Agencies conducted a fact finding ``Scan'' tour in Europe to evaluate their quiet pavement technology and policy. This was followed by the first comparative tire/pavement noise testing in the US and Europe using the same procedures and test tires. The results, issues, and future directions surrounding these activities will be discussed.

  12. Fracture of highway and airport pavements

    NASA Astrophysics Data System (ADS)

    Ramsamooj, D. V.

    1993-03-01

    Existing solutions for the stresses in a cracked slab containing a crack and supported by an elastic foundation are extended to obtain the stress intensity factor (SIF) for a crack in a pavement subjected to moving vehicular loads. In the existing solutions the stresses can be obtained only for a uniform bending stress (before the crack occurs) along the crack surface. For pavements subjected to moving vehicular loads, the stress distribution along the crack surface is not uniform and the approximation of a uniform stress is often unsatisfactory. The present work extends the above solutions to cover more realistic loading of highway and airport pavements. This facilitates the application of the principles of fracture mechanics to the fatigue crack propagation and fracture of pavements. Beginning with a part-through semi-elliptical starter crack, the crack is assumed to grow under load and the SIF is presented at various stages of crack growth, from the starter crack into a short through-crack that eventually becomes a very long through-crack. Some examples of the fracture of typical rigid and flexible highway and airport pavements are presented to show the need to consider fracture in the design of pavements.

  13. Investigation of strain-sensing materials based on EM surface wave propagation for steel bridge health monitoring

    E-print Network

    Hanson, George

    . 1 for monitoring a deck truss bridge: a layer of EM wave-guiding material is applied to steelInvestigation of strain-sensing materials based on EM surface wave propagation for steel bridge Available online 5 March 2011 Keywords: Electromagnetic surface wave Strain-sensing material Bridge Health

  14. Thermal Stability Analysis under Embankment with Asphalt Pavement and Cement Pavement in Permafrost Regions

    PubMed Central

    Jinping, Li; Xiaojuan, Quan

    2013-01-01

    The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8?m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results. PMID:24027444

  15. Bridge permeameter

    DOEpatents

    Graf, Darin C. (Edgewood, NM); Warpinski, Norman R. (Albuquerque, NM)

    1996-01-01

    A system for single-phase, steady-state permeability measurements of porous rock utilizes a fluid bridge arrangement analogous to a Wheatstone bridge. The arms of the bridge contain the sample and calibrated flow resistors.

  16. Myocardial Bridge

    MedlinePLUS

    ... Sudden Cardiac Arrest Valve Disease Vulnerable Plaque Myocardial Bridge | Share Related terms: myocardium, coronary arteries, myocardial ischemia ... surface of the heart. What is a myocardial bridge? A myocardial bridge is a band of heart ...

  17. Work on Phoenix Science Deck

    NASA Technical Reports Server (NTRS)

    2007-01-01

    Lockheed Martin Space Systems technicians Jim Young (left) and Jack Farmerie (right) work on the science deck of NASA's Phoenix Mars Lander.

    The spacecraft was built in a 100,000-class clean room near Denver under NASA's planetary protection practices to keep organics from being taken to Mars. The lander's robotic arm, built by the Jet Propulsion Laboratory, Pasadena, is seen at the top of the picture. The color and grey dots will be used to calibrate the spacecraft's Surface Stereoscopic Imager camera once the spacecraft has landed on the red planet.

    The Phoenix mission is led by Principal Investigator Peter H. Smith of the University of Arizona, Tucson, with project management at NASA's Jet Propulsion Laboratory and development partnership with Lockheed Martin Space Systems. International contributions for Phoenix are provided by the Canadian Space Agency, the University of Neuchatel (Switzerland), the University of Copenhagen, and the Max Planck Institute in Germany. JPL is a division of the California Institute of Technology in Pasadena.

  18. Pavement snow melting in Klamath Falls - rehabilitation of the ODOT Well

    SciTech Connect

    Thurston, R.E.; Culver, G.; Lund, J.W.

    1995-02-01

    This paper discusses the use of geothermal energy in pavement de-icing in Klamath Falls, Oregon. Due to a change in traffic routing in 1948, U.S. Highway 97 was routed with a new bridge and roadway through downtown Klamath Falls with an adverse 8 percent grade. Problems with traffic in winter led to the incorporation of a geothermal experiment in de-icing into the Oregon Department of Transportation (ODOT) construction project. The geothermal well was originally artesian, but the static water level has dropped over the years of usage, and the water temperatures at various depths have also dropped. Changes in city environmental regulations in 1985 have called for the elimination of all surface and sewer discharge from geothermal wells. Modifications to the existing pavement de-icing system which would bring it into compliance with the city ordinances are discussed in this paper.

  19. Improving a pavement-watering method on the basis of pavement surface temperature measurements

    E-print Network

    Hendel, Martin; Diab, Youssef; Royon, Laurent

    2014-01-01

    Pavement-watering has been studied since the 1990's and is currently considered a promising tool for urban heat island reduction and climate change adaptation. However, possible future water resource availability problems require that water consumption be optimized. Although pavement heat flux can be studied to improve pavement-watering methods (frequency and water consumption), these measurements are costly and require invasive construction work to install appropriate sensors in a dense urban environment. Therefore, we analyzed measurements of pavement surface temperatures in search of alternative information relevant to this goal. It was found that high frequency surface temperature measurements (more than every 5 minutes) made by an infrared camera can provide enough information to optimize the watering frequency. Furthermore, if the water retaining capacity of the studied pavement is known, optimization of total water consumption is possible on the sole basis of surface temperature measurements.

  20. A Systematic Investigation of Shear Connections Between Full-Depth Precast Panels and Precast Prestressed Bridge Girders 

    E-print Network

    Brey, Robert W.

    2010-07-14

    along with a previously developed crack angle model to layout the geometry of the truss within a deck-panel span. Design solutions are presented utilizing the Rock Creek Bridge in Parker County, Texas as an example structure....

  1. Demonstration of dual-band infrared thermal imaging for bridge inspection. Phase II, final report

    SciTech Connect

    Durbin, P.F.; Del Grande, N.K.; Schaich, P.C.

    1996-03-01

    Developing and implementing methods of effective bridge rehabilitation is a major issue for the Federal Highway Administration (FHWA). The nation spends $5 billion annually to replace, rehabilitate or construct new bridges. According to the National Bridge Inventory, over 100,000 U.S. bridges are structurally deficient. About 40,000 of these bridges have advanced deck deterioration. The most common causes of serious deck deterioration is delamination. Delaminations result when steel reinforcements within the bridge deck corrode, creating gaps that separate the concrete into layers. A reliable inspection technology, capable of identifying delaminations, would represent a power new tool in bridge maintenance. To date, most bridge inspections rely on human interpretation of surface visual features of chain dragging. These methods are slow, disruptive, unreliable and raise serious safety concerns. Infrared thermal imaging detects subsurface delaminations and surface clutter, which is introduced by foreign material on the roadway. Typically, foreign material which is not always evident on a video tape image, produces a unique IR reflectance background unlike the thermal response of a subsurface delamination. Lawrence Livermore National Laboratory (LLNL) uses dual-band infrared (DBIR) thermal imaging to identify and remove nonthermal IR reflectance backgrounds from foreign material on the roadway. DBIR methods improve the performance of IR thermal imaging by a factor of ten, compared to single-band infrared (SBIR) methods. DBIR thermal imaging allows precise temperature measurement to reliably locate bridge deck delaminations and remove wavelength-dependent emissivity variations due to foreign material on the roadway.

  2. Impact of Curing Methods on Curling of Concrete Pavements

    E-print Network

    ? · The current version of the MEPDG indicates that a concrete pavement will curl less if a "wet cure" is used of this project? · The current version of the MEPDG indicates that a concrete pavement will curl less if a "wetImpact of Curing Methods on Curling of Concrete Pavements Amir Hajibabaee Travis Ebisch Tyler Ley

  3. Performance of pavements designed with low-cost materials

    NASA Astrophysics Data System (ADS)

    Grau, R. W.; Yrjanson, W. A.; Packard, R. G.; Barksdale, R. D.; Potts, C. F.; Ruth, B. E.; Smith, L. L.; Huddleston, I. J.; Vinson, T. S.; Hicks, R. G.

    1980-04-01

    The following areas are discussed. Utilization of marginal aggregate materials for secondary road surface layers; econocrete pavements; current practices; construction and performance of sand-asphalt bases and performance of sand-asphalt and limerock pavements in Florida. Cement stabilization of degrading aggregates use of crushed stone screenings in highway construction (abridgement); and sulfur-asphalt pavement technology are also reviewed.

  4. Graded Viscoelastic Approach for Modeling Asphalt Concrete Pavements

    E-print Network

    Paulino, Glaucio H.

    Graded Viscoelastic Approach for Modeling Asphalt Concrete Pavements Eshan V. Dave'', William G of Illinois at Urb ana-Champaign Abstract. Asphalt concrete pavements exhibit severely graded properties viscoelastic model has been implemented within a numerical framework for the simulation of asphalt pavement

  5. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally

    E-print Network

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded ­ Verification ­ Concluding Remarks Part ­ II (Companion presentation) ­ Asphalt Pavements ­ Effect of Aging: Asphalt concrete pavements (Part II) E1 E2 E3 Eh 1 2 3 h #12;Graded Finite Elements Graded Elements

  6. Application of Graded Finite Elements for Asphalt Pavements

    E-print Network

    Paulino, Glaucio H.

    Application of Graded Finite Elements for Asphalt Pavements William G. Buttlar1 ; Glaucio H. Paulino2 ; and Seong Hyeok Song3 Abstract: Asphalt paving layers, particularly the surface course, exhibit: Fractures; Asphalt pavements; Finite element method; Material properties. Introduction Modern pavement

  7. Fast Error Estimates For Indirect Measurements: Applications To Pavement Engineering

    E-print Network

    Kreinovich, Vladik

    Fast Error Estimates For Indirect Measurements: Applications To Pavement Engineering Carlos that is difficult to measure directly (e.g., lifetime of a pavement, efficiency of an engine, etc). To estimate y computation time. As an example of this methodology, we give pavement lifetime estimates. This work

  8. Wisconsin DOT 1. Briefly summarize your current pavement smoothness requirements.

    E-print Network

    Wisconsin DOT 1. Briefly summarize your current pavement smoothness requirements. We currently-contact profiling equipment. Most PCC pavements are profiled using lightweight profilers when the project is still closed to traffic. Most HMA pavements are profiled using high speed profilers (with the same measuring

  9. Regular Inspection and Maintenance Guidance for Porous Pavements

    E-print Network

    Regular Inspection and Maintenance Guidance for Porous Pavements Regular inspection and maintenance is critical to the effective operation of porous pavement. It is the responsibility of the owner to maintain the pavement in accordance with the minimum design standards. This page provides guidance on maintenance

  10. An evaluation of the flexible pavement design system FPS19 

    E-print Network

    Carmona, Gerardo M

    1998-01-01

    in calculating pavement stiffness coefficients in a multi-layer pavement structure is a major deficiency in that version of FPS. A new version of the flexible pavement design program, FPS19, converts FPS to a linear elastic system using elastic moduli...

  11. PARTIAL-DEPTH REPAIR OF CONCRETE PAVEMENTSCONCRETE PAVEMENTS

    E-print Network

    Concrete pavement, portland cement concrete, concrete pavement joints No restrictions. 19. Security portland cement concrete QA quality assurance QC quality control w/c water/cement Figure SourcesTorella, Missouri/Kansas Chapter, ACPA: Figures 49, 51, 52 · Kevin McMullen, Wisconsin Concrete Pavement Association

  12. Pavement Sealcoat, PAHs, and the Environment

    NASA Astrophysics Data System (ADS)

    Van Metre, P. C.; Mahler, B. J.

    2011-12-01

    Recent research by the USGS has identified coal-tar-based pavement sealants as a major source of polycyclic aromatic hydrocarbons (PAHs) to the environment. Coal-tar-based sealcoat is commonly used to coat parking lots and driveways and is typically is 20-35 percent coal tar pitch, a known human carcinogen. Several PAHs are suspected mutagens, carcinogens, and (or) teratogens. In the central and eastern U.S. where the coal-tar-based sealants dominate use, sum-PAH concentration in dust particles from sealcoated pavement is about 1,000 times higher than in the western U.S. where the asphalt-based formulation is prevalent. Source apportionment modeling indicates that particles from sealcoated pavement are contributing the majority of the PAHs to recent lake sediment in 35 U.S. urban lakes and are the primary cause of upward trends in PAHs in many of these lakes. Mobile particles from parking lots with coal-tar-based sealcoat are tracked indoors, resulting in elevated PAH concentrations in house dust. In a recently completed study, volatilization fluxes of PAHs from sealcoated pavement were estimated to be about 60 times fluxes from unsealed pavement. Using a wide variety of methods, the author and colleagues have shown that coal-tar-based sealcoat is a major source of PAHs to the urban environment and might pose risks to aquatic life and human health.

  13. Evaluation of airport pavements using NDT approaches

    NASA Astrophysics Data System (ADS)

    Avdelidis, N. P.; Moropoulou, A.

    2007-04-01

    Corrosion of airport pavements is a major problem involved with materials engineering and transportation engineering. Airport pavements frequently start to deteriorate slowly primarily, gradually progressing to failure. Such failure can be expensive in terms of both money and lives, but can also be prevented. For that reason, intelligent techniques should be suggested, with the intention of examining the condition of such engineering structures. IR thermography and ground penetrating radar are two NDT (non-destructive testing) techniques that have the ability to inspect effectively substantial areas, such as airport pavements. In this work, two different airport pavements located at the International Airport of Athens, in Greece, were investigated by the use of the above two mentioned techniques. Successful detection of cracks, voids and other imperfections appearing either from the aging of the materials or due to poor workmanship was attained. Furthermore, this paper describes the problem of deteriorated airport pavements, shows the process and the apparatus used for the in situ tests, and finally presents results obtained from the investigations.

  14. Overview of the Arizona Quiet Pavement Program

    NASA Astrophysics Data System (ADS)

    Donavan, Paul; Scofield, Larry

    2005-09-01

    The Arizona Quiet Pavement Pilot Program (QP3) was initially implemented to reduce highway related traffic noise by overlaying most of the Phoenix metropolitan area Portland cement concrete pavement with a one inch thick asphalt rubber friction coarse. With FHWA support, this program represents the first time that pavement surface type has been allowed as a noise mitigation strategy on federally funded projects. As a condition of using pavement type as a noise mitigation strategy, ADOT developed a ten-year, $3.8 million research program to evaluate the noise reduction performance over time. Historically, pavement surface type was not considered a permanent solution. As a result, the research program was designed to specifically address this issue. Noise performance is being evaluated through three means: (1) conventional roadside testing within the roadway corridor (e.g., far field measurements within the right-of-way) (2) the use of near field measurements, both close proximity (CPX) and sound intensity (SI); and (3) far field measurements obtained beyond the noise barriers within the surrounding neighborhoods. This paper provides an overview of the program development, presents the research conducted to support the decision to overlay the urban freeway, and the status of current research.

  15. ACAA pavement manual. Recommended practice: Coal fly ash in pozzolanic stabilized mixtures for flexible pavement systems

    SciTech Connect

    Not Available

    1991-01-01

    The purpose of this manual is to guide pavement design engineers, materials engineers, and construction managers in the design and construction of flexible pavement systems in which low- to high-strength Pozzolanic Stabilized Mixtures' ( PSMs') serve as base layers. A PSM incorporates coal fly ash in combination with activators, aggregates and water. Each of three design methods is useful for determining the thickness of a PSM base layer for a flexible pavement system: Method A - American Association of State Highway and Transportation Officials (AASHTO) flexible pavement design procedures, using structural layer coefficients; Method B - Mechanistic pavement design procedures, using resilient modulus values for the pavement layers; and Method C - A combination of Method A and Method B, using mechanistic design concepts for determining pavement layer coefficients. PSMs offer several advantages: PSMs are strong, durable mixtures using locally available materials; PSMs are economically competitive with properly engineered full-depth asphalt or crushed stone base courses; PSMs are suited to stabilizing recycled base mixtures; and PSMs are placed and compacted with conventional construction equipment. To provide the needed guidance for capturing the long-term service and cost-saving features of a PSM design, this manual details the following: a procedure for proportioning PSMs; thickness design procedures which include base layer and asphalt wearing course; and proven techniques for PSM mixing and base layer construction.

  16. 46 CFR 171.140 - Drainage of a flush deck vessel.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel...

  17. 46 CFR 171.140 - Drainage of a flush deck vessel.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel...

  18. 46 CFR 171.140 - Drainage of a flush deck vessel.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel...

  19. 46 CFR 171.140 - Drainage of a flush deck vessel.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel...

  20. 46 CFR 171.140 - Drainage of a flush deck vessel.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel...

  1. Nondestructive evaluation techniques for enhanced bridge inspection

    SciTech Connect

    Thomas, G.; Benson, S.; Durbin, P.; Del Grande, N.; Haskins, J.; Brown, A.; Schneberk, D.

    1993-10-01

    Nondestructive evaluation of bridges is a critical aspect in the US aging infrastructure problem. For example in California there are 26,000 bridges, 3000 are made of steel, and of the steel bridges, 1000 are fracture critical. California Department of Transportation (Caltrans), Federal Highway Administration, and Lawrence Livermore National Laboratory (LLNL) are collaborating to develop and field NDE techniques to improve bridge inspections. We have demonstrated our NDE technologies on several bridge inspection applications. An early collaboration was to ultrasonically evaluate the steel pins in the E-9 pier on the San Francisco Bay Bridge. Following the Loma-Prieta earthquake in 1989 and the road way collapse at the E-9 pier, a complete nondestructive evaluation was conducted by Caltrans inspectors and several ultrasonic indications were noted. LLNL worked with Caltrans to help identify the source of these reflections. Another project was to digitally enhance high energy radiographs of bridge components such as cable end caps. We demonstrated our ability to improve the detection of corrosion and fiber breakage inside the end cap. An extension of this technology is limited view computer tomography (CT). We implemented our limited view CT software and produced cross-sectional views of bridge cables from digitized radiographic films. Most recently, we are developing dual band infrared imaging techniques to assess bridge decks for delaminations. We have demonstrated the potential of our NDE technology for enhancing the inspection of the country`s aging bridges.

  2. Spills on Flat Inclined Pavements

    SciTech Connect

    Simmons, Carver S.; Keller, Jason M.; Hylden, Jeff L.

    2004-03-01

    This report describes the general spill phenomenology for liquid spills occurring on relatively impermeable surfaces such as concrete or asphalt pavement and the development and application of a model to describe the time evolution of such spills. The discussion assumes evaporation and degradation are negligible and a homogeneous surface. In such an instance, the inherent interfacial properties determine the spatial extent of liquid spreading with the initial flow being controlled by the release rate of the spill and by the liquids resistance to flow as characterized by its viscosity. A variety of spill scenarios were simulated and successful implementation of the model was achieved. A linear relationship between spill area and spill volume was confirmed. The simulations showed spill rate had little effect on the final spill area. Slope had an insignificant effect on the final spill area, but did modify spill shape considerably. However, a fluid sink on the edge of the simulation domain, representing a storm drain, resulted in a substantial decrease in spill area. A bona fide effort to determine the accuracy of the model and its calculations remain, but comparison against observations from a simple experiment showed the model to correctly determine the spill area and general shape under the conditions considered. Further model verification in the form of comparison against small scale spill experiments are needed to confirm the models validity.

  3. Performance of continuously reinforced concrete pavements: Volume 6 -- CRC pavement design, construction, and performance. Final report, August 1990--December 1994

    SciTech Connect

    Zollinger, D.G.; Buch, N.; Xin, D.; Soares, J.

    1999-02-01

    This report is one of a series of reports prepared as part of a recent study sponsored by the Federal Highway Administration (FHWA) aimed at updating the state-of-the-art of the design, construction, maintenance, and rehabilitation of continuous reinforced concrete (CRC) pavements. The scope of work of the FHWA study included the following: (1) Conduct of a literature review and preparation of an annotated bibliography on CRC pavements and CRC overlays. (2) Conduct of a field investigation and laboratory testing related to 23 existing in-service pavement sections. This was done to evaluate the effect of various design features on CRC pavement performance, to identify any design or construction related problems, and to recommend procedures to improve CRC pavement technology. (3) Evaluation of the effectiveness of various maintenance and rehabilitation strategies for CRC pavements. (4) Preparation of a Summary Report on the current state of the practice for CRC pavements. Each of the above four items is addressed in a separate report. The following reports have been prepared under this study: Performance of CRC Pavements. Volume 1: Summary of Practice and Annotated Bibliography. Volume 2: Field Investigation of CRC Pavements. Volume 3: Analysis and Evaluation of Field Test Data. Volume 4: Resurfacing for CRC Pavements. Volume 5: Maintenance and Repair of CRC Pavements. Volume 6: CRC Pavement Design, Construction, and Performance. Volume 7: Summary. This report is Volume 6 in the series.

  4. Advances in Modeling of Aerodynamic Forces on Bridge Xinzhong Chen1

    E-print Network

    Kareem, Ahsan

    Advances in Modeling of Aerodynamic Forces on Bridge Decks Xinzhong Chen1 and Ahsan Kareem2 Abstract: Aerodynamic forces on bridges are commonly separated into static, self-excited, and buffeting in modeling aerodynamic forces. Formulations for airfoil sections and those based on quasi- steady theory

  5. Design of airport pavements for expansive soils

    NASA Astrophysics Data System (ADS)

    McKeen, R. G.

    1981-01-01

    Expansive soil subgrades exhibit volume changes with variation in moisture condition. These changes result in differential movement of airport pavements resting on these soils. Special design procedures must be used to account for the expansive soil activity during equilibration. In addition, special precautions are required to protect the subgrade from moisture variation with climate. Measurement of soil suction is a key step in quantifying moisture-induced soil behavior. Procedures are outlined for suction characterization of the soil and for estimating the in situ differential movement likely to occur under the pavement. Once the wavelength and amplitude characteristics of the differential movement are obtained, design calculations to select the thickness and materials for the pavement may proceed.

  6. 61. View forward down hurricane deck toward salon clerestory, walking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    61. View forward down hurricane deck toward salon clerestory, walking beam, stack, and wheelhouse. Second smaller stack is from donkey boiler on main deck. - Ferry TICONDEROGA, Route 7, Shelburne, Chittenden County, VT

  7. 123. FORWARD PORT VIEW OF THE ISLAND WITH FLIGHT DECK ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    123. FORWARD PORT VIEW OF THE ISLAND WITH FLIGHT DECK GUN MOUNTS, TAKEN FROM FORWARD FLIGHT DECK. APRIL 1945, (NATIONAL ARCHIVES NO. 80-G-469299) - U.S.S. HORNET, Puget Sound Naval Shipyard, Sinclair Inlet, Bremerton, Kitsap County, WA

  8. Micro-thermal stress analysis of cement based pavement composite

    SciTech Connect

    Li, G.; Zhao, Y.; Pang, S.S.; Huang, W.

    1998-12-31

    A four-layer sphere model for microscopic thermal analysis was proposed based upon the structural form of cement based pavement composites. Using temperature induced stresses of pavement structure as the external field, the micro-thermal stresses of two types of cement based pavement composite were calculated. The results showed that, by introducing the low stiffness rubberized asphalt in the interphase of coarse aggregate phase and cement mortar phase of Portland cement concrete, the interfacial thermal stresses could be reduced significantly, thus improving crack resistance of the pavement material under low temperature environment. Factors affecting micro-thermal stress of cement based pavement composite were discussed.

  9. Breaking/cracking and seating concrete pavements. Final report

    SciTech Connect

    Thompson, M.R.

    1989-03-01

    This synthesis will be of interest to pavement designers, maintenance engineers, and others interested in reducing reflection cracking of asphalt overlays on portland cement concrete (PCC) pavement. Information is presented on the technique of breaking or cracking of the concrete pavement into small segments before overlaying with asphalt concrete. Asphalt concrete overlays on existing PCC pavements are subject to reflection cracking induced by thermal movements of PCC pavement. The report of the Transportation Research Board discusses the technique of breaking/cracking and seating of the existing PCC before an overlay as a means to reduce or eliminate reflection cracking.

  10. The Collapse of the I-35W Bridge in Minneapolis

    ERIC Educational Resources Information Center

    Feldman, Bernard J.

    2010-01-01

    On Wednesday, Aug. 1, 2007, at 6:05 p.m. (during evening rush hour), the I-35W bridge across the Mississippi River in Minneapolis collapsed, killing 13 people and injuring 145. At the time of the collapse, repair work was in progress on the deck of the bridge, resulting in an additional 287 tons of construction material and equipment being on the…

  11. 46 CFR 132.320 - Helicopter-landing decks.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Helicopter-landing decks. 132.320 Section 132.320 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS FIRE-PROTECTION EQUIPMENT Miscellaneous § 132.320 Helicopter-landing decks. Each vessel with a helicopter-landing deck...

  12. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  13. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

  14. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

  15. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

  16. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

  17. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  18. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

  19. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

  20. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

  1. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

  2. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  3. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  4. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

  5. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

  6. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 2013-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  7. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  8. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

  9. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

  10. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

  11. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 2012-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  12. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  13. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 2011-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

  14. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 2014-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  15. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

  16. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

  17. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13 Shipping... ENDORSEMENTS Qualified Member of the Engine Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC or MMD endorsed as junior engineer....

  18. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13 Shipping... ENDORSEMENTS Qualified Member of the Engine Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC or MMD endorsed as junior engineer....

  19. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13 Shipping... ENDORSEMENTS Qualified Member of the Engine Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC or MMD endorsed as junior engineer....

  20. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13 Shipping... ENDORSEMENTS Qualified Member of the Engine Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC or MMD endorsed as junior engineer....

  1. 14 CFR 121.547 - Admission to flight deck.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Admission to flight deck. 121.547 Section... REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any person to the flight deck of an aircraft unless the person being...

  2. 14 CFR 121.547 - Admission to flight deck.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Admission to flight deck. 121.547 Section... REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any person to the flight deck of an aircraft unless the person being...

  3. 14 CFR 121.547 - Admission to flight deck.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Admission to flight deck. 121.547 Section... REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any person to the flight deck of an aircraft unless the person being...

  4. 14 CFR 121.547 - Admission to flight deck.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Admission to flight deck. 121.547 Section... REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any person to the flight deck of an aircraft unless the person being...

  5. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Water on deck. 28.565 Section 28.565 Shipping COAST... VESSELS Stability § 28.565 Water on deck. (a) Each vessel with bulwarks must comply with the requirements... energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure...

  6. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Water on deck. 28.565 Section 28.565 Shipping COAST... VESSELS Stability § 28.565 Water on deck. (a) Each vessel with bulwarks must comply with the requirements... energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure...

  7. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Water on deck. 28.565 Section 28.565 Shipping COAST... VESSELS Stability § 28.565 Water on deck. (a) Each vessel with bulwarks must comply with the requirements... energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure...

  8. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Water on deck. 28.565 Section 28.565 Shipping COAST... VESSELS Stability § 28.565 Water on deck. (a) Each vessel with bulwarks must comply with the requirements... energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure...

  9. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Water on deck. 28.565 Section 28.565 Shipping COAST... VESSELS Stability § 28.565 Water on deck. (a) Each vessel with bulwarks must comply with the requirements... energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure...

  10. 46 CFR 69.109 - Under-deck tonnage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Under-deck tonnage. 69.109 Section 69.109 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DOCUMENTATION AND MEASUREMENT OF VESSELS MEASUREMENT OF VESSELS Standard Measurement System § 69.109 Under-deck tonnage. (a) Defined. “Under-deck tonnage” means the tonnage of the space below...

  11. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 2013-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

  12. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 2010-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

  13. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 2012-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

  14. 46 CFR 12.15-13 - Deck engine mechanic.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 2011-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

  15. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Figure 28.565. (c) The water on deck heeling energy must...following: (1) The deck well is filled to the top of the...values of the vessel without the water on deck; and (4) Water in the well is free to run-off over...

  16. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Figure 28.565. (c) The water on deck heeling energy must...following: (1) The deck well is filled to the top of the...values of the vessel without the water on deck; and (4) Water in the well is free to run-off over...

  17. 46 CFR 28.565 - Water on deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Figure 28.565. (c) The water on deck heeling energy must...following: (1) The deck well is filled to the top of the...values of the vessel without the water on deck; and (4) Water in the well is free to run-off over...

  18. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 7 2013-07-01 2013-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor... (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo operations require them to be...

  19. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Weather deck ladders. 108.167 Section 108.167 Shipping... EQUIPMENT Construction and Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have at least one permanent, inclined ladder between each weather deck. Classified Locations...

  20. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Weather deck communications. 92.10-45 Section 92.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  1. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... weather deck. The weather deck must have open rails to allow rapid clearing of water, or must have...

  2. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Weather deck communications. 92.10-45 Section 92.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  3. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Weather deck ladders. 108.167 Section 108.167 Shipping... EQUIPMENT Construction and Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have at least one permanent, inclined ladder between each weather deck. Classified Locations...

  4. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each...

  5. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Weather deck communications. 190.10-45 Section 190.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 190.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  6. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 3 2014-10-01 2014-10-01 false Weather deck communications. 72.10-45 Section 72.10-45... ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders. Where ladders are...

  7. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 7 2014-07-01 2014-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor... (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo operations require them to be...

  8. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Weather deck communications. 190.10-45 Section 190.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 190.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  9. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Weather deck communications. 92.10-45 Section 92.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  10. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false Weather deck communications. 72.10-45 Section 72.10-45... ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders. Where ladders are...

  11. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 7 2011-07-01 2011-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor... (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo operations require them to be...

  12. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Weather deck communications. 190.10-45 Section 190.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 190.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  13. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each...

  14. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Weather deck communications. 190.10-45 Section 190.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 190.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  15. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each...

  16. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Weather deck ladders. 108.167 Section 108.167 Shipping... EQUIPMENT Construction and Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have at least one permanent, inclined ladder between each weather deck. Classified Locations...

  17. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each...

  18. 46 CFR 173.062 - Drainage of weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each...

  19. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 3 2012-10-01 2012-10-01 false Weather deck communications. 72.10-45 Section 72.10-45... ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders. Where ladders are...

  20. 46 CFR 190.10-45 - Weather deck communications.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Weather deck communications. 190.10-45 Section 190.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 190.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  1. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Weather deck ladders. 108.167 Section 108.167 Shipping... EQUIPMENT Construction and Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have at least one permanent, inclined ladder between each weather deck. Classified Locations...

  2. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... weather deck. The weather deck must have open rails to allow rapid clearing of water, or must have...

  3. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Weather deck communications. 92.10-45 Section 92.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  4. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Weather deck communications. 72.10-45 Section 72.10-45... ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders. Where ladders are...

  5. 46 CFR 108.167 - Weather deck ladders.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Weather deck ladders. 108.167 Section 108.167 Shipping... EQUIPMENT Construction and Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have at least one permanent, inclined ladder between each weather deck. Classified Locations...

  6. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... weather deck. The weather deck must have open rails to allow rapid clearing of water, or must have...

  7. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 7 2010-07-01 2010-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor... (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo operations require them to be...

  8. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... weather deck. The weather deck must have open rails to allow rapid clearing of water, or must have...

  9. 46 CFR 174.215 - Drainage of weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... weather deck. The weather deck must have open rails to allow rapid clearing of water, or must have...

  10. 29 CFR 1918.36 - Weather deck rails.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 7 2012-07-01 2012-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor... (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo operations require them to be...

  11. 46 CFR 72.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 3 2013-10-01 2013-10-01 false Weather deck communications. 72.10-45 Section 72.10-45... ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders. Where ladders are...

  12. 46 CFR 92.10-45 - Weather deck communications.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Weather deck communications. 92.10-45 Section 92.10-45... CONSTRUCTION AND ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical communication shall be provided between the various weather decks by means of permanent inclined ladders....

  13. Quantitative analysis of microtubule orientation in interdigitated leaf pavement cells.

    PubMed

    Akita, Kae; Higaki, Takumi; Kutsuna, Natsumaro; Hasezawa, Seiichiro

    2015-01-01

    Leaf pavement cells are shaped like a jigsaw puzzle in most dicotyledon species. Molecular genetic studies have identified several genes required for pavement cells morphogenesis and proposed that microtubules play crucial roles in the interdigitation of pavement cells. In this study, we performed quantitative analysis of cortical microtubule orientation in leaf pavement cells in Arabidopsis thaliana. We captured confocal images of cortical microtubules in cotyledon leaf epidermis expressing GFP-tubulin? and quantitatively evaluated the microtubule orientations relative to the pavement cell growth axis using original image processing techniques. Our results showed that microtubules kept parallel orientations to the growth axis during pavement cell growth. In addition, we showed that immersion treatment of seed cotyledons in solutions containing tubulin polymerization and depolymerization inhibitors decreased pavement cell complexity. Treatment with oryzalin and colchicine inhibited the symmetric division of guard mother cells. PMID:26039484

  14. Chip Seals for Asphalt Concrete Pavements: A Proposed Emulsion Residue Specification and Existing Pavement Texture Evaluation 

    E-print Network

    Hoyt, Denise

    2012-07-16

    from chip seal emulsions; and investigation of texture measurement methods for assessing existing pavement macrotexture before a chip seal is placed. The performance graded (PG) asphalt binder specification, which was developed to characterize asphalt...

  15. Flight-deck automation: Promises and problems

    NASA Technical Reports Server (NTRS)

    Wiener, E. L.; Curry, R. E.

    1980-01-01

    The state of the art in human factors in flight-deck automation is presented. A number of critical problem areas are identified and broad design guidelines are offered. Automation-related aircraft accidents and incidents are discussed as examples of human factors problems in automated flight.

  16. 46 CFR 116.900 - Deck rails.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... direction. The point and uniform loads do not need to be applied simultaneously. (c) Where space limitations... International Convention on Load Lines must be at least 1,000 millimeters (39.5 inches) high. (3) All other... required by paragraph (a) of this section and the deck so that no open space exists that is more than...

  17. 46 CFR 116.900 - Deck rails.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... direction. The point and uniform loads do not need to be applied simultaneously. (c) Where space limitations... International Convention on Load Lines must be at least 1,000 millimeters (39.5 inches) high. (3) All other... required by paragraph (a) of this section and the deck so that no open space exists that is more than...

  18. 46 CFR 116.900 - Deck rails.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... direction. The point and uniform loads do not need to be applied simultaneously. (c) Where space limitations... International Convention on Load Lines must be at least 1,000 millimeters (39.5 inches) high. (3) All other... required by paragraph (a) of this section and the deck so that no open space exists that is more than...

  19. 46 CFR 116.900 - Deck rails.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... direction. The point and uniform loads do not need to be applied simultaneously. (c) Where space limitations... International Convention on Load Lines must be at least 1,000 millimeters (39.5 inches) high. (3) All other... required by paragraph (a) of this section and the deck so that no open space exists that is more than...

  20. 46 CFR 116.900 - Deck rails.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... direction. The point and uniform loads do not need to be applied simultaneously. (c) Where space limitations... International Convention on Load Lines must be at least 1,000 millimeters (39.5 inches) high. (3) All other... required by paragraph (a) of this section and the deck so that no open space exists that is more than...

  1. On Deck with the Scarlett Isabella

    USGS Multimedia Gallery

    A view from the deck of the Scarlett Isabella.  The USGS returned from a seafloor data mapping mission offshore of the Delmarva Peninsula (Ocean City, MD) on July 25th, 2014. The data collected is foundational to our continued understanding of coastal change, vulnerabilities, and making our co...

  2. 75 FR 4584 - Wire Decking From China

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-28

    ... to the extent permitted by section 201.8 of the Commission's rules, as amended, 67 FR 68036 (November..., 67 FR 68168, 68173 (November 8, 2002). Additional written submissions to the Commission, including... Wire Decking From China AGENCY: United States International Trade Commission. ACTION: Scheduling of...

  3. Flight deck automation: Promises and realities

    NASA Technical Reports Server (NTRS)

    Norman, Susan D. (editor); Orlady, Harry W. (editor)

    1989-01-01

    Issues of flight deck automation are multifaceted and complex. The rapid introduction of advanced computer-based technology onto the flight deck of transport category aircraft has had considerable impact both on aircraft operations and on the flight crew. As part of NASA's responsibility to facilitate an active exchange of ideas and information among members of the aviation community, a NASA/FAA/Industry workshop devoted to flight deck automation, organized by the Aerospace Human Factors Research Division of NASA Ames Research Center. Participants were invited from industry and from government organizations responsible for design, certification, operation, and accident investigation of transport category, automated aircraft. The goal of the workshop was to clarify the implications of automation, both positive and negative. Workshop panels and working groups identified issues regarding the design, training, and procedural aspects of flight deck automation, as well as the crew's ability to interact and perform effectively with the new technology. The proceedings include the invited papers and the panel and working group reports, as well as the summary and conclusions of the conference.

  4. Studies of the effect of aging of ``quiet'' pavements on tire/pavement noise

    NASA Astrophysics Data System (ADS)

    Reyff, James A.; Donavan, Paul

    2005-09-01

    One of the issues with using quieter pavements to abate traffic noise is their continued acoustic performance over the life cycle of the surface. Aging effects can be assessed in two manners: (1) long term monitoring of the noise performance of an individual section of roadway; (2) measurement of multiple sections of pavement of the same construction, but different ages. Long term monitoring of Interstate 80 near Davis (I-80 Davis) began in 1998, just prior to the placement of a dense graded leveling course and open graded asphalt overlay. The pavement surface is now approaching 7 years old and continues to show a traffic noise reduction of about 5 dBA over the existing condition. As support of the Arizona Quiet Pavement Program (QPPP), similarly constructed sections of asphalt rubber friction course (ARFC) on Arizona's interstate highways were measured for tire/pavement performance using the close proximity (CPX) method and the on-board sound intensity method. The construction dates for the pavements ranged from 1988 to 1999. The total range in noise level was 7 dB with some indication of degrading performance with age.

  5. Cognitive representations of flight-deck information attributes

    NASA Technical Reports Server (NTRS)

    Ricks, Wendell R.; Jonsson, Jon E.; Rogers, William H.

    1994-01-01

    A large number of aviation issues are generically being called fligh-deck information management issues, underscoring the need for an organization or classification structure. One objective of this study was to empirically determine how pilots organize flight-deck information attributes and -- based upon that data -- develop a useful taxonomy (in terms of better understanding the problems and directing solutions) for classifying flight-deck information management issues. This study also empirically determined how pilots model the importance of flight-deck information attributes for managing information. The results of this analysis suggest areas in which flight-deck researchers and designers may wish to consider focusing their efforts.

  6. Desert pavement study at Amboy, California

    NASA Technical Reports Server (NTRS)

    Williams, S.; Greeley, R.

    1984-01-01

    Desert pavement is a general term describing a surface that typically consists of a thin layer of cm-sized rock fragments set on top of a layer of finer material in which no fragments are found. An understanding of desert pavement is important to planetary geology because they may play a major role in the formation and visibility of various aeolian features such as wind streaks, which are important on Mars and may be important on Venus. A field study was conducted in Amboy, California to determine the formation mechanism of desert pavements. The probable sequence of events for the formation and evolution of a typical desert pavement surface, based on this experiment and the work of others, is as follows. Starting with a layer of surface material consisting of both fine particles and rock fragments, aeolian deflation will rapidly erode the surface until an armored lag is developed, after which aeolian processes become less important. The concentration of fragments then slowly increases as new fragments are brought to the surface from the subsurface and as fragments move downslope by sheet wash. Sheet wash would be responsible for removing very fine particles from the surface and for moving the fragments relative to one another, forming interlocks.

  7. Experimental pavement using household waste slag

    SciTech Connect

    Kouda, Masahiro

    1996-12-31

    Municipal wastes used to be simply landfilled, but because of increasing difficulty in finding disposal sites, it became common practice to incinerate wastes and landfill the ash. In view of rapidly dwindling landfill sites, the author thought that the landfill site problem might be solved by finding a way to utilize slag made from incinerator ash. In this paper, a method for utilizing water-granulated slag as an asphalt pavement material is discussed. On the basis of laboratory test results, trial paving using base course materials consisting of crushed stone and 25 or 50% slag was carried out, paying attention primarily to bearing capacity. Marshall tests and fatigue resistance tests were conducted to determine the optimum content of water-granulated slag, and it was concluded that quality comparable to that of conventional asphalt concrete was attained at the slag content of 25% or less and that no problem would arise if the slag content was kept at 60% or less of the fine aggregate content. The mix proportions thus determined were also tested through experimental paving. A follow-up study to evaluate the durability of the experimental pavements confirmed that the experimental pavements were comparable in performance with conventional asphalt concrete pavements. This paper also reports on some problems encountered that need to be solved before utilizing water-granulated slag.

  8. Permeable pavement research – Edison, New Jersey

    EPA Science Inventory

    These are the slides for the New York City Concrete Promotional Council Pervious Concrete Seminar presentation. The basis for the project, the monitoring design and some preliminary monitoring data from the permeable pavement parking lot at the Edison Environmental Center are pre...

  9. Permeable Pavements, Green Roofs, and Cisterns

    E-print Network

    Hunt, William F.

    ), such as bioretention (see AGW- within low-impact development (LID). 588-05 for more information), permeable LID uses Permeable Pavements, Green Roofs, and Cisterns Stormwater Treatment Practices for Low-Impact Development Stormwater runoff continues to be a concern in communities large and small across North Carolina

  10. Noise from Aft Deck Exhaust Nozzles: Differences in Experimental Embodiments

    NASA Technical Reports Server (NTRS)

    Bridges, James E.

    2014-01-01

    Two embodiments of a rectangular nozzle on an aft deck are compared. In one embodiment the lower lip of the nozzle was extended with the sidewalls becoming triangles. In a second embodiment a rectangular nozzle was fitted with a surface that fit flush to the lower lip and extended outward from the sides of the nozzle, approximating a semi-infinite plane. For the purpose of scale-model testing, making the aft deck an integral part of the nozzle is possible for relatively short deck lengths, but a separate plate model is more flexible, accounts for the expanse of deck to the sides of the nozzle, and allows the nozzle to stand off from the deck. Both embodiments were tested and acoustic far-field results were compared. In both embodiments the extended deck introduces a new noise source, but the amplitude of the new source was dependent upon the span (cross-stream dimension) of the aft deck. The noise increased with deck length (streamwise dimension), and in the case of the beveled nozzle it increased with increasing aspect ratio. In previous studies of slot jets in wings it was noted that the increased noise from the extended aft deck appears as a dipole at the aft deck trailing edge, an acoustic source type with different dependence on velocity than jet mixing noise. The extraneous noise produced by the aft deck in the present studies also shows this behavior both in directivity and in velocity scaling.

  11. Bridge permeameter

    DOEpatents

    Graf, D.C.; Warpinski, N.R.

    1996-08-13

    A system is described for single-phase, steady-state permeability measurements of porous rock which utilizes a fluid bridge arrangement analogous to a Wheatstone bridge. The arms of the bridge contain the sample and calibrated flow resistors. 8 figs.

  12. Pavement management and weigh-in-motion. Transportation research record

    SciTech Connect

    Cation, K.A.; Shahin, M.Y.; Scullion, T.; Lytton, R.L.; Butt, A.A.

    1987-01-01

    The 15 papers in the report deal with the following areas: development of a preventive maintenance algorithm for use in pavement-management systems; pavement-performance prediction model using the Markov Process; roadway modeling and data conversion for a transportation-facilities information system; development of a methodology to estimate pavement maintenance and repair costs for different ranges of pavement-condition index; new techniques for modeling pavement deterioration; pavement management at the local government level; a comprehensive ranking system for local-agency pavement management; expert system as a part of pavement management; MAPCON: a pavement-evaluation data-analysis computer system; a microcomputer procedure to analyze axle load limits and pavement damage responsibility; selected results from the first three years of the Oregon automatic monitoring demonstration project; automated acquisition of truck-tire pressure data; calibration and accuracy testing of weigh-in-motion systems; accuracy and tolerances of weigh-in-motion systems; on-site calibration of weigh-in-motion systems.

  13. Substantial Maintenance Practices for Bridges on the Kansas State Highway System

    E-print Network

    Hurt, Mark Anthony

    2013-05-31

    -list .............................................................. 24 Figure 3.5—East sliding plate expansion joint and deteriorated deck concrete on Br. 10-46-176 ............. 25 Figure 3.6—Rocker bearing tipped at west abutment of Br. 10-46-177 ..................................................... 26 Figure 3.7...—Deteriorated deck concrete on Br. 10-46-179 ......................................................................... 26 Figure 3.8—Truck on 17th St. impacting I-135 bridge in Wichita ............................................................. 28 Figure 3...

  14. 26. RAILROAD, RR BRIDGE MISSISSIPPI, CLAY CO., WAVERLY 1.5 mi. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. RAILROAD, RR BRIDGE MISSISSIPPI, CLAY CO., WAVERLY 1.5 mi. S of MS. 50 Proposed 218-foot deck, plate-girder turn span, submitted by the Wisconsin Bridge and Iron Co., Milwaukee, Wisc. May 15 1914. Act size: approx. 23x34 in. Credit: columbus and Greenville RR, Columbus, Ms. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  15. Development of methodology for detection of defect locations in pavement profile 

    E-print Network

    Rawool, Shubham Shivaji

    2005-08-29

    Pavement smoothness has become a standard measure of pavement quality. Transportation agencies strive to build and maintain smoother pavements. Smooth roads provide comfort while riding, minimize vehicular wear and tear ...

  16. 76 FR 67018 - Notice to Manufacturers of Airport In-Pavement Stationary Runway Weather Information Systems

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-28

    ...Airport In-Pavement Stationary Runway Weather Information Systems AGENCY: Federal Aviation...Manufacturers of In-Pavement Stationary Runway Weather Information Systems...Passive In- Pavement Stationary Runway Weather Information Systems that meet the...

  17. Simplified Solution for Periodic Thermal Discontinuities in Asphalt Overlays Bonded to Rigid Pavements

    E-print Network

    Paulino, Glaucio H.

    Simplified Solution for Periodic Thermal Discontinuities in Asphalt Overlays Bonded to Rigid discontinuities distributed in a hot mix asphalt overlay bonded to a rigid pavement, where the length Database subject headings: Thermal stresses; Fracture mechanics; Asphalt pavements; Rigid pavements

  18. Experimental Study on Geocell-Reinforced Recycled Asphalt Pavement (RAP) Bases under Static and Cyclic Loading

    E-print Network

    Thakur, Jitendra Kumar

    2011-01-13

    Recycled Asphalt Pavement (RAP) is a removed and reprocessed pavement material containing asphalt and aggregates which can be used as a base course material for pavement applications. Geocells are a three-dimensional interconnected honeycomb type...

  19. CE 363 -TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus

    E-print Network

    Hickman, Mark

    1 CE 363 - TRANSPORTATION ENGINEERING AND PAVEMENT DESIGN Fall 2009 Course Syllabus Catalog (4) CDT performance characteristics, highway geometric and pavement design principles; traffic analysis of transportation engineering and pavement design. Specifically, students should understand the basic concepts

  20. Thermal cracking of rubber modified pavements, May 1995. Final report

    SciTech Connect

    Raad, L.; Yuan, X.; Saboundjian, S.

    1995-05-01

    In accordance with the original ISTEA mandate (1991) to use crumb tire rubber in pavements, Alaska would be required to use about 250 tons of used tire rubber starting in 1994 and increasing to about 1,000 tons of rubber in 1997 and each year thereafter. A number of pavements using crumb rubber modifiers have been built in the state and have been in service for periods of 8 to 15 years. Knowledge of the behavior of these rubber-modified pavements under extreme climate conditions, particularly in relation to their low temperature cracking resistance, is necessary for future design and construction of rubberized pavements in Alaska. This report presents results of a study to determine the low temperature cracking resistance of rubber modified pavements in Alaska in comparison with conventional asphalt concrete pavements.

  1. Training needs for advanced technology flight decks.

    PubMed

    Maurino, D

    1991-05-01

    The author examines training implications of increased automation in aircraft flight decks. Training issues include the need for basic pilot skills and knowledge, general knowledge of the aircraft, revision of Cockpit Resource Management (CRM) to reflect changes due to technology, and tailoring Line-Oriented Flight Training to focus on routine human-automation interfaces and CRM principles in addition to scenarios of abnormal conditions. PMID:11539339

  2. Study on Flexible Pavement Failures in Soft Soil Tropical Regions

    NASA Astrophysics Data System (ADS)

    Jayakumar, M.; Chee Soon, Lee

    2015-04-01

    Road network system experienced rapid upgrowth since ages ago and it started developing in Malaysia during the colonization of British due to its significant impacts in transportation field. Flexible pavement, the major road network in Malaysia, has been deteriorating by various types of distresses which cause descending serviceability of the pavement structure. This paper discusses the pavement condition assessment carried out in Sarawak and Sabah, Malaysia to have design solutions for flexible pavement failures. Field tests were conducted to examine the subgrade strength of existing roads in Sarawak at various failure locations, to assess the impact of subgrade strength on pavement failures. Research outcomes from field condition assessment and subgrade testing showed that the critical causes of pavement failures are inadequate design and maintenance of drainage system and shoulder cross fall, along with inadequate pavement thickness provided by may be assuming the conservative value of soil strength at optimum moisture content, whereas the exiting and expected subgrade strengths at equilibrium moisture content are far below. Our further research shows that stabilized existing recycled asphalt and base materials to use as a sub-base along with bitumen stabilized open graded base in the pavement composition may be a viable solution for pavement failures.

  3. Practical applications of nondestructive evaluation for airport pavement analysis

    NASA Astrophysics Data System (ADS)

    McQueen, Roy D.; Guo, Edward

    1995-07-01

    This paper discusses the equipment and methodologies currently used for nondestructive testing (NDT) and nondestructive evaluation (NDE) of the structural capacity of military and civil airport pavements, including: (1) commonly used equipment and test methods for measuring pavement response to dynamic loads; (2) qualitative and quantitative evaluation of NDT data; (3) methods for back-calculating layer properties from NDT data; (4) layered elastic methods for evaluating pavement performance using processed NDT data; and (5) application of analytical results for developing pavement rehabilitation and management strategies.

  4. Performance of recycled asphalt concrete airport pavement surfaces

    NASA Astrophysics Data System (ADS)

    Cline, G. D.; Hironaka, M. C.

    1986-10-01

    The objective of this research was to make an assessment of the relative performance of recycled versus new asphalt concrete pavement surfaces constructed for airport facilities. To make this assessment, pavement condition index (PCI) surveys and tests on core samples from the hot-mix recycled pavements located on the airports at Needles, California, and Valley City, North Dakota were conducted. Both pavements have a condition rating of very good. The survey and test data were compared with those for recycled highway and virgin material Navy airfield pavements. The recycle pavement at Needles is performing as good as those Navy pavements constructed with virgin material. The recycled pavement at Valley City has a higher deterioration rate than the Navy pavements but this could be attributed to the harsh climate found in North Dakota. The results of this study show that hot-mix recycling was successful at these airports but additional studies are required to determine the applicability of Asphalt Concrete (AC) recycling for reconstruction at all airports.

  5. Fully Coupled Buffeting Analysis of Long-Span Cable-Supported Bridges: Formulation

    NASA Astrophysics Data System (ADS)

    SUN, D. K.; XU, Y. L.; KO, J. M.; LIN, J. H.

    1999-12-01

    A formulation for fully coupled buffeting analysis of long-span cable-supported bridges is presented, in which dynamic coupling between modes of vibration, dynamic forces on bridge deck and towers and cables, and varying wind speed and structural properties along the bridge deck and towers and cables can be taken into consideration. This formulation adopts a finite element approach and a pseudo-excitation method. Aeroelastic forces on the bridge deck are changed into nodal forces to form aeroelastic damping and stiffness matrices while aerodynamic forces on the bridge deck, towers and cables are converted into nodal forces to obtain a loading vector. After the system equation of motion is assembled, the pseudo-excitation method is applied and the formulation is programmed so that a personal computer can be used to execute the buffeting analysis of the system of hundreds of degrees of freedom in 1 or 2 h. The results from the case study of a long suspension bridge using the proposed formulation and program are also selectively presented in this paper.

  6. 76 FR 62603 - Special Conditions: The Boeing Company, Model 747-8; Upper Deck Occupancy

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ... with communications between the two decks and between each deck and the flight deck. The FAA issued a... Administration 14 CFR Part 25 Special Conditions: The Boeing Company, Model 747-8; Upper Deck Occupancy AGENCY... have novel or unusual design features associated with upper deck occupancy. The...

  7. 6. DETAIL VIEW AT ROAD LEVEL, SHOWING STEELDECK GRATING AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. DETAIL VIEW AT ROAD LEVEL, SHOWING STEEL-DECK GRATING AND JUNCTURE OF ARCH AND PAVEMENT - Benson Street Concrete Bowstring Bridge, Spanning Mill Creek at Benson Street, Lockland, Hamilton County, OH

  8. Small-scale accelerated pavement testing

    SciTech Connect

    Kim, S.M.; Hugo, F.; Roesset, J.M.

    1998-03-01

    This paper presents the results of a study conducted to explore the use of small-scale models of accelerated pavement testing (APT) devices to evaluate the performance of pavements in conjunction with full-scale tests. The motivation for the study was the availability of a model mobile load simulator (MMLS), which had been built originally to illustrate the operation of the full-scale mobile load simulator (MLS) under design at the time. The scaling requirements will be different depending on whether dynamic (inertia), viscous, or gravity effects are important. One must thus decide which one of these effects controls the behavior to try to reproduce it exactly. In the preliminary tests conducted with the MMLS, emphasis had been placed in reproducing accurately the viscoelastic behavior of the asphalt layer. The possibility of obtaining valid results, even if similitude is not maintained in relation to inertia forces, is explored in this paper. The effects of load frequency or velocity and the effects of layer thicknesses are studied. The total thickness of the model pavement, which must be finite, and its effects on displacements and strains are also considered. It is concluded that even when full similitude is not satisfied it is possible to obtain valid results that can be extrapolated to predict prototype performance if one were interested primarily in the behavior of the asphalt layer. Preliminary analyses should be conducted, however, to guide on the selection of the model dimensions.

  9. Airport pavement NDE research at CQEFP

    NASA Astrophysics Data System (ADS)

    Popovics, John S.; Achenbach, Jan D.

    1996-11-01

    The Center for Quality Engineering and Failure Prevention (CQEFP) at Northwestern University is actively involved in the development of new stress-wave based non-destructive evaluation techniques for airport pavements. This paper summarizes recent accomplishments and outlines current research directions. The development of a new stress-wave source is detailed first. The stress-wave generating technique allows for a high degree of control of the input stress wave while at the same time enabling the generation of significant wave amplitudes. Experimental results on concrete specimens demonstrate the controllability and penetrating ability of the developed stress wave generation technique. Its performance is compared to that of an impact source. Experimental results from an existing stress-wave based NDE technique, the impact-echo method, are presented and limitations of that approach are demonstrated. Finally, directions of future airport pavement NDE research at CQEFP, which focus upon application of the developed stress wave generation technique to pavement NDE problems, are outlined.

  10. Multimodal approach to seismic pavement testing

    USGS Publications Warehouse

    Ryden, N.; Park, C.B.; Ulriksen, P.; Miller, R.D.

    2004-01-01

    A multimodal approach to nondestructive seismic pavement testing is described. The presented approach is based on multichannel analysis of all types of seismic waves propagating along the surface of the pavement. The multichannel data acquisition method is replaced by multichannel simulation with one receiver. This method uses only one accelerometer-receiver and a light hammer-source, to generate a synthetic receiver array. This data acquisition technique is made possible through careful triggering of the source and results in such simplification of the technique that it is made generally available. Multiple dispersion curves are automatically and objectively extracted using the multichannel analysis of surface waves processing scheme, which is described. Resulting dispersion curves in the high frequency range match with theoretical Lamb waves in a free plate. At lower frequencies there are several branches of dispersion curves corresponding to the lower layers of different stiffness in the pavement system. The observed behavior of multimodal dispersion curves is in agreement with theory, which has been validated through both numerical modeling and the transfer matrix method, by solving for complex wave numbers. ?? ASCE / JUNE 2004.

  11. 3. Elevation, tram deck, bonanza "A" frame and crushers level ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Elevation, tram deck, bonanza "A" frame and crushers level 11. - Kennecott Copper Corporation, Concentration Mill, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

  12. s.s. PACIFIC EXPLORER ~RT III -BELOW DECK ARRANGEMENTS

    E-print Network

    s.s. PACIFIC EXPLORER ~RT III - BELOW DECK ARRANGEMENTS AND REFRIGERATION EQUI PMEN"r .. I ..···...············.· ··· ~............. 17 Refrigeration System........................... 22 Power Plant Operational Problems......... .............. .... 31 Personnel

  13. 46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  14. 46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Deck rails, lifelines, storm rails, and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  15. 46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Deck rails, lifelines, storm rails, and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  16. 46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  17. 46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Deck rails, lifelines, storm rails, and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  18. 46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  19. 46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  20. 46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  1. 46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Deck rails, lifelines, storm rails, and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  2. 46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Deck rails, lifelines, storm rails, and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

  3. 46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

  4. 46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

  5. 46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

  6. 46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

  7. 46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

  8. 77 FR 25189 - Extension of Agency Information Collection Activity Under OMB Review: Federal Flight Deck Officer...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-27

    ...Collection Activity Under OMB Review: Federal Flight Deck Officer Program AGENCY: Transportation...suitability for participating in the Federal Flight Deck Officer (FFDO) Program, and deputized...Collection Requirement Title: Federal Flight Deck Officer Program. Type of...

  9. Safer Bridges

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Safer bridges are among a number of spinoff benefits from NASA procedures for testing 'cfracture toughness" of a structural part, meaning its ability to -siscracktsh at might cause failure. The New River Bridge in West Virginia, shown under construction, is the world's largest single span bridge. U.S. Steel fracture toughness requirements for such bridges include NASA-developed test procedures. Bridge materials and other metal structures may develop flaws during their service lifetimes. Such flaws can affect the structural integrity of the part. Thus, it is important to know the "fracture toughness" of a structural part, or its ability to resist cracks. NASA has long experience in developing fracture toughness tests for aerospace hardware. Since 1960, NASA-Lewis has worked closely with the American Society for Testing & Materials. Lewis and NASA-funded industrial contractors have made many important contributions to test procedures, now recommended by ASTM, for measuring fracture toughness.

  10. Permeable pavement monitoring at the Edison Environmental Center demonstration site

    EPA Science Inventory

    There are few detailed studies of full-scale, replicated, actively-used pervious pavement systems. Practitioners need additional studies of pervious pavement systems in its intended application (parking lot, roadway, etc.) during a range of climatic events, daily usage conditions...

  11. Permeable Pavement Monitoring at the Edison Environmental Center Demonstration Site

    EPA Science Inventory

    There are few detailed studies of full-scale, replicated, actively-used pervious pavement systems. Practitioners need additional studies of pervious pavement systems in its intended application (parking lot, roadway, etc.) during a range of climatic events, daily usage conditions...

  12. Field performance of geosynthetic reinforced pavements over expansive clay subgrades

    E-print Network

    Zornberg, Jorge G.

    Field performance of geosynthetic reinforced pavements over expansive clay subgrades Zornberg, J, The University of Texas, Austin, USA 78712 Keywords: reinforced pavements; expansive soils; geogrids; geotextiles in the form of heave dur- ing wet season and shrinkage during dry season. Experience in the Texas Department

  13. Permeable Pavement Demonstration at the Edison Environmental Center (Hartford)

    EPA Science Inventory

    In general, there is a lack of full-scale, outdoor, real-world porous pavement studies with system replicates. More studies of porous pavement operating in its intended use (parking lot, roadway, etc.) with climatic events, regular use, and maintenance effects, are necessary. The...

  14. Permeable Pavement Research at the Edison Environmental Center

    EPA Science Inventory

    There are few detailed studies of full-scale, replicated, actively-used permeable pavement systems. Practitioners need additional studies of permeable pavement systems in its intended application (parking lot, roadway, etc.) across a range of climatic events, daily usage conditio...

  15. Permeable pavement demonstration site at Edison Environmental Center (Presentation)

    EPA Science Inventory

    There are few studies of full-scale, outdoor, replicated, working pervious pavement systems. More studies of pervious pavement operating in its intended use (parking lot, roadway, etc.) during a range of climatic events, daily usage conditions, and maintenance regimes are necessa...

  16. Full-Depth Asphalt Pavements for Parking Lots and Driveways.

    ERIC Educational Resources Information Center

    Asphalt Inst., College Park, MD.

    The latest information for designing full-depth asphalt pavements for parking lots and driveways is covered in relationship to the continued increase in vehicle registration. It is based on The Asphalt Institute's Thickness Design Manual, Series No. 1 (MS-1), Seventh Edition, which covers all aspects of asphalt pavement thickness design in detail,…

  17. Permeable pavement demonstration at the Edison Environmental Center (Hartford, CT)

    EPA Science Inventory

    In general, there is a lack of full-scale, outdoor, real-world porous pavement studies with system replicates. More studies of porous pavement operating in its intended use (parking lot, roadway, etc.) with climatic events, regular use, and maintenance effects, are necessary. The...

  18. Permeable pavement demonstration at the Edison Environmental Center

    EPA Science Inventory

    There are few studies of full-scale, outdoor, replicated, functioning pervious pavement systems. More studies of pervious pavement operating in its intended use (parking lot, roadway, etc.) during a range of climatic events, daily usage conditions, and maintenance regimes are nec...

  19. 211. EQUIPMENT LAYING FIRST LANE OF CONCRETE PAVEMENT NEAR THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    211. EQUIPMENT LAYING FIRST LANE OF CONCRETE PAVEMENT NEAR THE CAPITAL OVERLOOK, 1931. NOTE THE BEGINNING OF BITUMINOUS TYPE OF TEMPORARY PAVEMENT TO ALLOW FOR SETTLEMENT IN HYDRAULIC FILL AREAS. - George Washington Memorial Parkway, Along Potomac River from McLean to Mount Vernon, VA, Mount Vernon, Fairfax County, VA

  20. Guide to Cement-Based Integrated Pavement Solutions

    E-print Network

    Guide to Cement-Based Integrated Pavement Solutions August 2011 #12;Cement-Based Integrated Commercial Residential Recreation LAND USE CEMENT-BASED INTEGRATED PAVEMENT SOLUTIONS 1 2 3 4 5 6 7 8 Conventional Overlays CRCP VIBRATORY COMPACTION Pervious Concrete Full-Depth Reclamation Cement- Treat- ed Base