A maximum load of $120$ tons is

expected on a wood crib that has an $18-$

inch$-$square support point. The average

compression strength of the wood is $200$

psi. The bending stress of a steel bearing

plate is $25,000$ psi. What size bearing

plate do you need to support the load?

A$.34\mathrm{.}6$ inches square by $\frac{1^{15}}{16}$

inches thick

B$.8\mathrm{.}3$ inches square by $\frac{1^7}{16}$ inches

thick

C$.42\mathrm{.}5$ inches square by $\frac{2^1}{4}$ inches

thick

D$.6\mathrm{.}7$ inches square by $\frac{1^3}{8}$ inches

thick