Determine the size modification factor, ψs, for a rectangula…
Determine the size modification factor, ψs, for a rectangular beam with b = 17 in. and d = 20 in., four galvanized No. 6 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 6 in. along the span. Assume 7,000-psi normal-weight concrete and a clear cover of 1.5 in.