Two kinds of parapets of British Aluminium Co are specified -- P1 barrier for roadway underbridges which is able to contain 30 cwt vehicle striking it at 70 mph at angle of 20°, and P2 system for roadway overbridges where demands are similar except that speed limit is reduced to 50 mph; design of systems is so arranged that at predetermined load posts fail, thus allowing rails to absorb impact energy from vehicle by stretching or elongating. (14143)


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    Title :

    Aluminium bridge parapets designed to increase safety


    Additional title:

    Surv -- Local Govt Technol


    Published in:

    Publication date :

    1968


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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