Chapter 18, Problem 18.15P

For Problems 18.11 through 18.17, unless otherwise noted, yield stress of the steel is 50 ksi (345 MPa) (ASTM A992).

18.15 Calculate the allowable axial compressive load for a $\text{W12 }\times \text{ 5}0$ structural steel column having a 12-in-by- $\frac{1}{2}$-in. plate bolted to each flange. The unbraced length is 32 ft. The ends are pin-connected. Use $F_y=\text{ 36 ksi}$.