Determine the lightweight modification factor, λ, for a rect…
Determine the lightweight modification factor, λ, for a rectangular beam with b = 17 in. and d = 22 in., three galvanized No. 6 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 3 Grade 60 stirrups located every 10 in. along the span. Assume 7,000-psi normal-weight concrete and a clear cover of 1.75 in.