Problem $3$

Select a single angle to support a tensile live load $($LL$)$ of $40$ kips and dead load $($DL$)$ of $15$ kips $.$

Assume the angles are separated back to back by $\frac{3}{8}$ in and the connection is bolted with single

line and more than $3$ bolts of diameter of $\frac{3}{4}in.$ Assume the slenderness ratio $(\frac{L}{r_{\text{m}\text{i}\text{n}}})$ is desired to

not exceed $300.$ The length of element is $15$ ft and the steel is A$36.$