$1-71.$ The connection is made using a bolt and nut and

two washers. If the allowable bearing stress of the washers

on the boards is $({}_b{)}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=2$ksi, and the allowable tensile

stress within the bolt shank $S$ is $({}_t{)}_{\text{s}\text{t}\text{l}\text{o}\text{w}}=18$ksi, detemine

the maximum allowable tension in the bolt shank. The bolt

shank has a diameter of $0\mathrm{.}31$ in $.,$ and the washers have an outer

diameter of $0\mathrm{.}75$ in $.$ and inner diameter $($hole$)$ of $0\mathrm{.}50$ in $.$