As part of a continuing cooperative research between the Midwest Roadside Safety Facility (MwRSF); the USDA Forest Service, Forest Products Laboratory (FPL); and the Federal Highway Administration (FHWA), several crashworthy wood bridge railings and approach railing transactions have been adopted for use on concrete bridge decks. These railings meet testing and evaluation criteria outlined in National Cooperative Research Program (NCHRP) 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 utlimate capacity of connections used on the wood deck to those required for a concrete deck.


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    Title :

    Plans for Crash-Tested Wood Bridge Railings for Concrete Decks


    Contributors:
    M. A. Ritter (author) / R. K. Faller (author) / P. D. H. Lee (author) / B. T. Rosson (author) / S. R. Duwadi (author)

    Publication date :

    1998


    Size :

    40 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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