Using the ACI coefficients, design a continuous reinforced concrete beam that will span four supports. The end spans are 24-ft long; the center span is 28-ft long (spans are measured center to center of supports). The exterior support (a spandrel beam) and the interior supporting girders have widths b of 18 in. The service loads are 0.90 kip/ft dead load (not including the weight of the beam) and 1.10 kip/ft live load. Use f′c = 3000 psi. Use only tension rein forcing. Design for moment only. Use the recommended bar cutoffs shown in Figure.
