Practical Application

P$3\mathrm{.}32.$ A one$-$lane bridge consists of a $10-$in$.-$thick, $16-$ft$-$wide reinforced concrete slab supported on two steel girders spaced $10$ ft apart. The girders are $62-ft$ long and weigh $400l\frac{b}{f}t.$ The bridge is to be designed for a uniform live load of $700l\frac{b}{f}t$ acting over the entire length of the bridge. Determine the maximum reaction applied to an end support due to dead, live, and impact loads. The live load may be assumed to act along the centerline of the deck slab and divide equally between the two girders. Each concrete curb weighs $240l\frac{b}{f}t$ and each rail $120l\frac{b}{f}t.$ Stone concrete has a unit weight of $150l\frac{b}{f}{t}^3.$ Assume an impact factor of $1\mathrm{.}33.$

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