Back$-$to$-$back angles $($double angles$)$ are connected to a gusset plate using one line of bolts parallel to the applied tension force through one leg. The senior connection designer suggested using $3$ bolts in $14$ mm diameter holes spaced at $70$ mm with an edge distance of $60$ mm and an end distance of $40$ mm$.$ Calculate the block shear resistance of the back$-$to$-$back angles for the arrangement described above. The angles are both a quarter inch thick. "Show clear Steps"