Chapter 11, Problem 11.12P

A short post. $\text{15}0\text{ mm}$ by $\text{15}0\text{ mm}$ , of Douglas fir, is reinforced by the addition of two ASTM $\text{A36}$ steel plates. The cross section is shown. Assume that the components are of equal lengths and are so connected that they act as a single unit and deform equally. Use the nominal dimensions of the wood, as shown, and compute the allowable compressive load. Allowable compressive stress for the steel is $\text{147 MPa}$ .