A pin$-$connected truss is loaded and supported as shown. Each aluminum member has a cross$-$sectional area of $A=3\mathrm{.}9$ in$.{?}^2.$ Assume $a=$

$3\mathrm{.}50ft$ and $b=4\mathrm{.}20ft.$ If the normal stress in each member must not exceed $25$ksi, determine the maximum load $P_{\text{m}\text{a}\text{x}}$ that may be

supported by the structure.

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

kips