Design a rectangular beam section, i. e. select b, d, h, and the required area of tension steel, As at mid-span for a 22 ft-span simply supported beam that support its own weight, a superimposed service dead load of 1.25 kip/ft, and a uniform service live load of 2 kip/ft. Start by assuming the self-weight of the beam Ws = 410 lbs/ft, b = 0.7d, and use ′ = 5 psi and = 6, psi. The middle T beam shown has a span of 18 ft. Determine the required area of tension steel for the T-beam to supports a service dead load moment of 100 k/ft and a service live load moment of 125 k/ft. Use fc single prime = 4000 psi and f_y = 60, 000 psi.