1. Calculate the critical Euler buckling stress for a W 12 x 40 steel column 24 ft in length with a modulus of elasticity of 3 x 107 psi.
2. Using the Euler formula, calculate the critical load of a 1.5-in. diameter steel rod 3 ft long used as a compression member. Assume end conditions are pinned- connected and the modulus of elasticity is 3 x 107 psi.