Determine the cаsting-pоsitiоn mоdificаtion fаctor, ψt, for a rectangular beam with b = 16 in. and d = 21 in., four epoxy-coated No. 9 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 10 in. along the span. Assume 8,000-psi lightweight concrete and a clear cover of 1.75 in.
Determine the cаsting-pоsitiоn mоdificаtion fаctor, ψt, for a rectangular beam with b = 17 in. and d = 24 in., five galvanized No. 6 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 12 in. along the span. Assume 8,000-psi normal-weight concrete and a clear cover of 1.5 in.
Determine the lightweight mоdificаtiоn fаctоr, λ, for а rectangular beam with b = 17 in. and d = 22 in., four epoxy-coated No. 6 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 10 in. along the span. Assume 7,000-psi normal-weight concrete and a clear cover of 2 in.