$3-15.$ An L$6$ X $6\backslash$times $1/2$ is used as a tension member, with one$(3\mathrm{.}1$ is not given$)$

gage line of $3/4-$in $$ bolts

in each leg at the usual gage location $($see Table $3\mathrm{.}1).$ What is the minimum amount of

stagger,s$,$ necessary so that only one bolt need be subtracted from the gross area of the

angle? Compute the net area of this member if the lines of holes are staggered at $3$ in$.$

$($Ans$.$ s $=4\mathrm{.}77$ in$,$ An $=5\mathrm{.}05$ in$2)$