Problem 3: A footbridge is to be built, consisting of a one-way solid slab spanning 16 ft. between masonry abutments, as shown below. A service live load of 100 psf must be carried. In addition, a 2000 lb concentrated load, assumed to be uniformly distributed across the bridge width, may act at any location on the span. A 2 in. asphalt wearing surface will be used, weighing 20 psf. Precast concrete curbs are attached so as to be nonstructural. Prepare a design for the slab and check it for shear, using material strengths f'. = 4 ksi and f = 60 ksi. Note that the width of the end supports of the slab is 1 ft. The weight of the end curbs can be neglected. 16' 2" asphalt 6" curb