Problem $7-4$: A wood beam carries a bending moment of $15,500lb.-$in$.$ It has a rectangular cross section $1\mathrm{.}50$ in $.$ wide $7\mathrm{.}25in.$ high. Compute the maximum

stress due to bending in the beam.

A$)$ Moment of Intertie, $I_{x-x}=$

$i{n}^4$

B$)$ Distance to top$/$bottom surface of cross$-$section, $C=$

in$.$

D$)$ Applied bending stress $==\frac{MC}{\text{I}}=$

psi