Chapter 18, Problem 18.14P

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

18.14 Calculate the allowable axial compressive load for a steel pipe column having an unbraced length of 20 ft. The ends are pin-connected. Use $A=\text{ 11}.\text{9in}{.}^{\text{2}}$ and $r=\text{ 3}.\text{67 in}.$ $F_y=\text{ 35 ksi}$.