Determine the values of b (width), d (superelevation) and As (steel area) of a beam that supports a bending moment Mu composed of; dead load moment MD = 83.33 ft-kips + live load moment ML = 125 ft-kips + snow load moment MS = 100 ft-kips. Use f´c = 3,500 psi, and fy = 50,000 psi.
Consider a strength reduction factor for a structural member used as a connecting component in precast members controlled by the creep of steel in members in tension. ACI 318.