The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Wanda L Menges - One of the best experts on this subject based on the ideXlab platform.
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Retrofit Railings for Truss Bridges
2005Co-Authors: C Eugene Buth, Wanda L Menges, William F Williams, Rebecca R HaugAbstract:In 2003, there were 38 metal truss bridges 50 years of age or older remaining on the State of Texas highway system. Of these 38 bridges, 33 are listed in the National Register of Historic Places. Many of these bridges do not meet current design criteria for rehabilitation due to narrow deck widths, low vertical clearance, and substandard load capacity. In addition, the existing bridge railing systems on these bridges have not been shown to meet the current requirements for safety and strength. This project addressed the design and performance of acceptable traffic Railings for existing and new truss bridges in Texas. Specific objectives were to: (1) design/develop a retrofit railing for low-speed application on the Roy B. Inks Bridge in Llano, Texas; (2) design/develop a retrofit railing for high-speed application on the U.S. 281 Bridge over the Brazos River in Palo Pinto County, Texas; (3) identify criteria that can serve as a basis for design exceptions; and design/develop a traffic railing for new truss bridges.
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TESTING OF NEW BRIDGE RAIL AND TRANSITION DESIGNS. VOLUME IV: APPENDIX C - ILLINOIS 2399-1 BRIDGE RAILING
1997Co-Authors: C E Buth, T J Hirsch, Wanda L MengesAbstract:The original Illinois 2399 bridge railing design has been used as a retrofit railing on selected structures. A structural analysis indicated that strength of the railing could be increased by changing positions of the lower and upper rail elements to obtain more beam strength along the top. The modified design (Illinois 2399-1) was tested to performance level two of the 1989 AASHTO Guide Specifications for Bridge Railings. Acceptable performance was demonstrated.
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TESTING OF NEW BRIDGE RAIL AND TRANSITION DESIGNS. VOLUME III: APPENDIX B - BR27D BRIDGE RAILING
1997Co-Authors: C E Buth, T J Hirsch, Wanda L MengesAbstract:A combination concrete parapet and metal railing for performance level one of the 1989 AASHTO Guide Specifications for Bridge Railings was designed and tested while mounted both on a sidewalk and flush on the deck. The upper portion of the railing permits some visibility through the railing while the 42-in. (1.07-m) height is provided for pedestrians. Acceptable performance was demonstrated in the tests.
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TESTING OF NEW BRIDGE RAIL AND TRANSITION DESIGNS. VOLUME X: APPENDIX I - 42-IN. (1.07-M) CONCRETE PARAPET BRIDGE RAILING
1997Co-Authors: C E Buth, T J Hirsch, Wanda L MengesAbstract:A 42-in. (1.07-m) vertical faced concrete parapet bridge railing was designed and tested to performance level three of the 1989 AASHTO Guide Specifications for Bridge Railings. The parapet was mounted on a 10-in. (254-mm) thick simulated bridge deck overhang. Acceptable performance of the railing was demonstrated.
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TESTING OF NEW BRIDGE RAIL AND TRANSITION DESIGNS. VOLUME VIII: APPENDIX G - BR27C BRIDGE RAILING
1997Co-Authors: C E Buth, T J Hirsch, Wanda L MengesAbstract:A combination concrete parapet and metal railing was designed for performance level one of the 1989 AASHTO Guide Specifications for Bridge Railings. Computed strength of the railing is 18 kips (80 kN) at 40 in. (1.02 m) above the deck (sidewalk) or 91 kips (405 kN) at 27 in. (686 mm) above the deck (sidewalk). The railing was tested to performance level two and acceptable results were obtained.
C Eugene Buth - One of the best experts on this subject based on the ideXlab platform.
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Retrofit Railings for Truss Bridges
2005Co-Authors: C Eugene Buth, Wanda L Menges, William F Williams, Rebecca R HaugAbstract:In 2003, there were 38 metal truss bridges 50 years of age or older remaining on the State of Texas highway system. Of these 38 bridges, 33 are listed in the National Register of Historic Places. Many of these bridges do not meet current design criteria for rehabilitation due to narrow deck widths, low vertical clearance, and substandard load capacity. In addition, the existing bridge railing systems on these bridges have not been shown to meet the current requirements for safety and strength. This project addressed the design and performance of acceptable traffic Railings for existing and new truss bridges in Texas. Specific objectives were to: (1) design/develop a retrofit railing for low-speed application on the Roy B. Inks Bridge in Llano, Texas; (2) design/develop a retrofit railing for high-speed application on the U.S. 281 Bridge over the Brazos River in Palo Pinto County, Texas; (3) identify criteria that can serve as a basis for design exceptions; and design/develop a traffic railing for new truss bridges.
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PERFORMANCE LEVEL 1 BRIDGE Railings
Transportation Research Record, 1995Co-Authors: Dean C. Alberson, Wanda L Menges, C Eugene ButhAbstract:Twenty-three states, FHWA, and the District of Columbia sponsored the project Testing of New Bridge Rail and Transition Designs that was completed in September 1993. Bridge railing for Performance Levels 1, 2, and 3, as specified in the 1989 American Association of State Highway and Transportation Officials "Guide Specifications for Bridge Railings", were tested under the contract. This paper discusses the design and performance of the two bridge Railings tested at Performance Level 1. The Oregon side-mounted railing has been used on small bridges on low-volume rural roads and is typically mounted on prestressed deck planks. The W6 X 15 posts are mounted on the side face of exterior planks, and a single thickness of 10-gauge thrie beam is mounted to the posts without blockouts. Height to the top of the rail element is 690 mm (27 in.). The BR27D railing design consists of a concrete parapet with a metal beam-and-post railing mounted on top of the parapet. For testing, it was mounted both on top of a sidewalk and flush on the deck.
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Performance level 3 bridge Railings
Transportation Research Record, 1995Co-Authors: Wanda L Menges, D. Lance Bullard, C Eugene Buth, C F McdevittAbstract:Many existing bridge Railings have been designed to restrain and redirect passenger vehicles. Because of specific site conditions, some locations along the nation's highways require that bridge Railings contain and redirect heavier vehicles, such as commercial trucks and buses. These sites include areas where the consequences of failure to contain a vehicle would be severe. Examples include bridges that are grade separation structures crossing heavily congested traffic lanes, areas of reduced radius of curvature, elevated ramps near schools or hospitals, and other areas where additional protection is needed to prevent heavier vehicles from penetrating or rolling over the bridge railing. According to the 1989 American Association of State Highway and Transportation Officials (AASHTO) "Guide Specifications for Bridge Railings", these sites require Performance Level 3 (PL3) bridge Railings. Two PL3 bridge Railings were developed under a recently completed pooled funds study sponsored by the Federal Highway Administration, the District of Columbia, and 23 states. The 1.07-m (42-in.) F-shape bridge railing and the 1.07-m (42-in.) concrete parapet were tested and evaluated according to the PL3 requirements of the 1989 AASHTO guide. Both bridge Railings performed acceptably.
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DEVELOPMENT OF COMBINATION PEDESTRIAN-TRAFFIC BRIDGE Railings
Transportation Research Record, 1994Co-Authors: D. Lance Bullard, Wanda L Menges, C Eugene ButhAbstract:Two bridge railing designs have been developed for use in urban areas. The Railings consist of concrete parapets with metal Railings mounted on top of the parapet. The parapets facilitate transfer of post loads into the bridge deck and the metal railing portion permits visibility through the railing. The Railings were designed by ultimate-strength methods of analysis. Prototypes of each design were subjected to full-scale crash tests when they were mounted on 8-in. (20.3-cm)-high, 5-ft (1.5 m)-wide sidewalks and when they were mounted flush on simulated bridge decks. Acceptable performance was obtained in all tests.
Ronald K Faller - One of the best experts on this subject based on the ideXlab platform.
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design and testing of two bridge Railings for transverse nail laminated timber deck bridges
Transportation Research Record, 2011Co-Authors: Mario Mongiardini, Ronald K Faller, Scott K Rosenbaugh, John D Reid, Robert W Bielenberg, Dean L SickingAbstract:Nail-laminated timber deck bridges represent an economical and convenient solution for rural low-volume roads, but a need exists to develop effective railing systems for this type of roadway structure. This paper describes the development of two bridge Railings that are specifically designed for transverse nail-laminated timber deck bridges and that meet the requirements for Test Level 1 (TL-1) of the "Manual for Assessing Safety Hardware" (MASH) and TL-2 of NCHRP Report 350. The design for each of the railing systems was based on retrofit modifications applied to existing bridge Railings that were previously successfully tested: one for a longitudinal glue-laminated timber deck and the other for a transverse glue-laminated timber deck. For both railing systems, component testing was performed to investigate the behavior of the proposed design and the potential advantage of various solutions. A full-scale crash test assessed the safety performance of the TL-1 curb-type railing under the new MASH criteria, while dynamic component tests were deemed sufficient for the assessment of the steel railing under TL-2 conditions for NCHRP Report 350.
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Railing Systems for Use on Timber Deck Bridges
Transportation Research Record, 1999Co-Authors: Ronald K Faller, Michael A. Ritter, B T Rosson, Sheila Rimal DuwadiAbstract:Bridge railing systems in the United States have historically been designed based on static load criteria given in the AASHTO Standard Specifications for Highway Bridges. In the past decade, full-scale vehicle crash testing has been recognized as a more appropriate and reliable method of evaluating bridge railing acceptability. In 1989, AASHTO published the Guide Specifications for Bridge Railings, which gave the recommendations and procedures to evaluate bridge rails by full-scale vehicle crash testing. In 1993, the National Cooperative Highway Research Program (NCHRP) published Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features, which provided criteria for evaluating longitudinal barriers. Based on these specifications, a cooperative research program was initiated between the University of Nebraska-Lincoln and the Forest Products Laboratory, and later the FHWA, to develop and crash test 11 bridge rails for wood deck bridges. The research that resulted in success...
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Plans for crash-tested wood bridge Railings for concrete decks
1998Co-Authors: Michael A. Ritter, Ronald K Faller, B T Rosson, Paula D. Hilbrich Lee, Sheila Rimal DuwadiAbstract:As part of a continuing cooperative research between the Midwest Roadside Safety Facility at the University of Nebraska, Lincoln; the U.S. Department of Agriculture, Forest Service, Forest Products Laboratory; and the Federal Highway Administration, several crashworthy wood bridge Railings and approach railing transitions have been adapted for use on concrete bridge decks. These Railings meet testing and evaluation criteria outlined in National Cooperative Highway Research Program Report 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features," and include a glued-laminated timber (glulam) rail, with and without a curb, at Test Level-2 (TL-2), a glulam rail with curb at TL-4, and a glulam curb rail for low-volume roads at TL-1. In adapting the Railings from a wood deck to a concrete deck, the critical consideration was railing attachment to the deck. A comparable connection was obtained by an analysis of maximum loads measured by field instrumentation during crash testing or by equating the ultimate capacity of connections used on the wood deck to those required for a concrete deck. For the convenience of the user, full drawing sets are provided in customary U.S. and S.I. units.
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RAILING SYSTEMS FOR LONGITUDINAL TIMBER DECK BRIDGES
1996Co-Authors: Ronald K Faller, Michael A. Ritter, B T Rosson, Pdh Lee, Sheila Rimal DuwadiAbstract:Bridge railing systems in the United States have historically been designed based on static load criteria given in the American Association of State Highway and Transportation Officials (AASHTO) 'Standard Specifications for Highway Bridges'. In 1989, AASHTO published the 'Guide Specifications for Bridge Railings' which gives recommendations and procedures to evaluate Railings by full-scale vehicle crash testing. In 1993, the National Cooperative Highway Research Program (NCHRP) published 'Report 350, 'Recommended Procedures for the Safety Performance Evaluation of Highway Features', which provides criteria for evaluating longitudinal barriers. Based on these specifications, a cooperative research program was initiated between the University of Nebraska-Lincoln and the Forest Products Laboratory, and later the Federal Highway Administration, to develop and crash test several bridge Railings for longitudinal wood decks. This paper describes the successful development and testing of nine resulting railing systems in accordance with AASHTO Performance Level 1 and 2 (PL-1 and PL-2) requirements, and the Test Level 1 and 4 (TL-1 and TL-4) requirements of NCHRP Report 350.
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performance level 2 and test level 4 bridge Railings for timber decks
Transportation Research Record, 1995Co-Authors: Barry T. Rosson, Ronald K Faller, Michael A. RitterAbstract:The Midwest Roadside Safety Facility, in cooperation with the Federal Highway Administration and U.S. Department of Agriculture Forest Service, Forest Products Laboratory, developed and tested two bridge Railings for use on longitudinal timber bridge decks: (a) a steel railing system (TBC-8000) and (b) a glulam timber railing system (GC-8000). The test for the TBC-8000 was conducted according to Performance Level 2 as specified in the AASHTO "Guide Specifications for Bridge Railings" (1989). The tests for the GC-8000 were conducted according to Test Level 4 as specified in NCHRP Report 350. The safety performance of each of the bridge Railings was acceptable according to each applicable crash test criterion. Both Railings provide aesthetically pleasing and economical alternatives for use on higher-service-level timber bridges.
Michael A. Ritter - One of the best experts on this subject based on the ideXlab platform.
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Railing Systems for Use on Timber Deck Bridges
Transportation Research Record, 1999Co-Authors: Ronald K Faller, Michael A. Ritter, B T Rosson, Sheila Rimal DuwadiAbstract:Bridge railing systems in the United States have historically been designed based on static load criteria given in the AASHTO Standard Specifications for Highway Bridges. In the past decade, full-scale vehicle crash testing has been recognized as a more appropriate and reliable method of evaluating bridge railing acceptability. In 1989, AASHTO published the Guide Specifications for Bridge Railings, which gave the recommendations and procedures to evaluate bridge rails by full-scale vehicle crash testing. In 1993, the National Cooperative Highway Research Program (NCHRP) published Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features, which provided criteria for evaluating longitudinal barriers. Based on these specifications, a cooperative research program was initiated between the University of Nebraska-Lincoln and the Forest Products Laboratory, and later the FHWA, to develop and crash test 11 bridge rails for wood deck bridges. The research that resulted in success...
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Plans for crash-tested wood bridge Railings for concrete decks
1998Co-Authors: Michael A. Ritter, Ronald K Faller, B T Rosson, Paula D. Hilbrich Lee, Sheila Rimal DuwadiAbstract:As part of a continuing cooperative research between the Midwest Roadside Safety Facility at the University of Nebraska, Lincoln; the U.S. Department of Agriculture, Forest Service, Forest Products Laboratory; and the Federal Highway Administration, several crashworthy wood bridge Railings and approach railing transitions have been adapted for use on concrete bridge decks. These Railings meet testing and evaluation criteria outlined in National Cooperative Highway Research Program Report 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features," and include a glued-laminated timber (glulam) rail, with and without a curb, at Test Level-2 (TL-2), a glulam rail with curb at TL-4, and a glulam curb rail for low-volume roads at TL-1. In adapting the Railings from a wood deck to a concrete deck, the critical consideration was railing attachment to the deck. A comparable connection was obtained by an analysis of maximum loads measured by field instrumentation during crash testing or by equating the ultimate capacity of connections used on the wood deck to those required for a concrete deck. For the convenience of the user, full drawing sets are provided in customary U.S. and S.I. units.
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RAILING SYSTEMS FOR LONGITUDINAL TIMBER DECK BRIDGES
1996Co-Authors: Ronald K Faller, Michael A. Ritter, B T Rosson, Pdh Lee, Sheila Rimal DuwadiAbstract:Bridge railing systems in the United States have historically been designed based on static load criteria given in the American Association of State Highway and Transportation Officials (AASHTO) 'Standard Specifications for Highway Bridges'. In 1989, AASHTO published the 'Guide Specifications for Bridge Railings' which gives recommendations and procedures to evaluate Railings by full-scale vehicle crash testing. In 1993, the National Cooperative Highway Research Program (NCHRP) published 'Report 350, 'Recommended Procedures for the Safety Performance Evaluation of Highway Features', which provides criteria for evaluating longitudinal barriers. Based on these specifications, a cooperative research program was initiated between the University of Nebraska-Lincoln and the Forest Products Laboratory, and later the Federal Highway Administration, to develop and crash test several bridge Railings for longitudinal wood decks. This paper describes the successful development and testing of nine resulting railing systems in accordance with AASHTO Performance Level 1 and 2 (PL-1 and PL-2) requirements, and the Test Level 1 and 4 (TL-1 and TL-4) requirements of NCHRP Report 350.
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performance level 2 and test level 4 bridge Railings for timber decks
Transportation Research Record, 1995Co-Authors: Barry T. Rosson, Ronald K Faller, Michael A. RitterAbstract:The Midwest Roadside Safety Facility, in cooperation with the Federal Highway Administration and U.S. Department of Agriculture Forest Service, Forest Products Laboratory, developed and tested two bridge Railings for use on longitudinal timber bridge decks: (a) a steel railing system (TBC-8000) and (b) a glulam timber railing system (GC-8000). The test for the TBC-8000 was conducted according to Performance Level 2 as specified in the AASHTO "Guide Specifications for Bridge Railings" (1989). The tests for the GC-8000 were conducted according to Test Level 4 as specified in NCHRP Report 350. The safety performance of each of the bridge Railings was acceptable according to each applicable crash test criterion. Both Railings provide aesthetically pleasing and economical alternatives for use on higher-service-level timber bridges.
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CRASH-TESTED BRIDGE Railings FOR TIMBER BRIDGES
1995Co-Authors: Michael A. Ritter, Ronald K Faller, Sheila Rimal DuwadiAbstract:Bridge railing systems in the United States historically have been designed on the basis of static load criteria given in the AASHTO "Standard Specifications for Highway Bridges". In the past decade, full-scale vehicle crash testing has been recognized as a more appropriate and reliable method of evaluating bridge railing acceptability. In 1989 AASHTO published "Guide Specifications for Bridge Railings", which gives the recommendations and procedures to evaluate bridge Railings by full-scale vehicle crash testing. In 1993 NCHRP published Report 350: "Recommended Procedures for the Safety Performance Evaluation of Highway Features", which provides criteria for evaluating longitudinal barriers. From these specifications, a cooperative research program was initiated to develop and crash test several bridge Railings for longitudinal wood decks. The research resulted in the successful development and testing of five bridge railing systems for longitudinally laminated wood bridge decks in accordance with the AASHTO Performance Level 1 and Performance Level 2 requirements and the Test Level 4 requirements of NCHRP Report 350.
Barry T. Rosson - One of the best experts on this subject based on the ideXlab platform.
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performance level 2 and test level 4 bridge Railings for timber decks
Transportation Research Record, 1995Co-Authors: Barry T. Rosson, Ronald K Faller, Michael A. RitterAbstract:The Midwest Roadside Safety Facility, in cooperation with the Federal Highway Administration and U.S. Department of Agriculture Forest Service, Forest Products Laboratory, developed and tested two bridge Railings for use on longitudinal timber bridge decks: (a) a steel railing system (TBC-8000) and (b) a glulam timber railing system (GC-8000). The test for the TBC-8000 was conducted according to Performance Level 2 as specified in the AASHTO "Guide Specifications for Bridge Railings" (1989). The tests for the GC-8000 were conducted according to Test Level 4 as specified in NCHRP Report 350. The safety performance of each of the bridge Railings was acceptable according to each applicable crash test criterion. Both Railings provide aesthetically pleasing and economical alternatives for use on higher-service-level timber bridges.
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performance level 1 bridge Railings for timber decks
Transportation Research Record, 1993Co-Authors: Ronald K Faller, Michael A. Ritter, James C Holloway, Brian G Pfeifer, Barry T. RossonAbstract:Historically, very little research has been conducted for developing crashworthy railing systems for timber bridge decks. For timber to be a viable material in the new construction of bridges, vehicular railing systems must be developed and crash tested. The USDA Forest Service, Forest Products Laboratory, in conjunction with the Midwest Roadside Safety Facility, undertook the task of developing and testing three bridge Railings--two glulam timber railing systems and one steel railing system--for use with longitudinal timber bridge decks. This research effort provided a variety of aesthetically pleasing and economical bridge-railing systems for timber decks. As part of the project, a series of four full-scale crash tests was conducted on the bridge-railing designs. The tests were conducted according to Performance Level 1 (PL1) specified in the AASHTO "Guide Specifications for Bridge Railings" (1989). The safety performance of each of the three bridge Railings was acceptable according to the PL1 guide specifications.