Problem $2.$

A beam cross has effective depth of $18$ in and web width of $8$ in$.$ The factored ultimate shear force at the critical cross section near the support is $64$ kip $.$

$=4500,f_{nt}=40,000.$

$($a$)$ Prove that shear reinforcement is required at the section.

$($b$)$ Calculate the spacing of No$.3$ double$-$legged stirrups.

$($c$)$ Check with the maximum spacing requirements.