$3\mathrm{.}4-2$ A tension member is composed of two $\frac{1}{2}10$ plates. They are connected to a gusset plate with the gusset plate between the two tension member plates, as shown in Figure P$3\mathrm{.}4-2.$ A$36$ steel and $\frac{3}{4}-$inch$-$diameter bolts are used. Determine the nominal strength based on the net section.

$P_n=479$kips