Current Attempt in Progress

If the allowable bearing stress for the material under the supports at A and $B$ is ${}_b=800$ psi, determine the maximum load $P_{\text{m}\text{a}\text{x}}$ that

can be applied to the beam. The bearing plates each have square cross sections of $3$ in $.$ by $3$ in $.$ The reactions at the supports are

vertical. Assume $w=500l\frac{b}{f}t,a=12ft,$ and $b=6ft.$

Answer: $P_{\text{m}\text{a}\text{x}}=$

lb