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From page 3...
... 3   Introduction Background As of January 1, 2020, all new and replacement bridge rails installed on the National Highway System are required to conform to the crash testing criteria in the Manual for Assessing Safety Hardware, 2nd Edition (MASH)
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... 4 MASH Railing Load Requirements for Bridge Deck Overhang 2. Performing preliminary analytical modeling to plan test specimens.

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