Determine the casting-position modification factor, ψt, for…
Determine the casting-position modification factor, ψt, for a rectangular beam with b = 18 in. and d = 23 in., five uncoated No. 9 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 60 stirrups located every 10 in. along the span. Assume 4,000-psi normal-weight concrete and a clear cover of 1.75 in.