For Problems 18-18 through 18-21, use the Euler—Johnson formulas, Eqs. (18-9) and (18-10...

For Problems 18-18 through 18-21, use the Euler—Johnson formulas, Eqs. (18-9) and (18-10), and a modulus of elasticity of 30,000,000 psi.

Calculate the allowable axial compressive load for a bar of rectangular cross section that measures 1 in. by 2 in. and is 20 in. long. The member is made of AISI 1040 hot-rolled steel. Use a factor of safety of 3.5 and assume the member is pin connected.