Civil Engineering: Reinforced Concrete Design. A rectangular beam having $b=12$ inches and $d=22$ inches spans $20ft$ face$-$to$-$face between simple

supports. It is reinforced for flexure with $3-$ #$11$ reinforcing bars uninterrupted to the ends of the span

$($the area of each #$11$ bar is $1\mathrm{.}56i{n}^2).$ The beam carries service dead load of $1\mathrm{.}63$kip$\frac{s}{f}t($including self$-$

weight of the beam$)$ and a service live load of $3\mathrm{.}26$kip$\frac{s}{f}t,$ both uniformly distributed along the span.

Design the shear reinforcement and show the stirrups layout along full length of the beam. Use No$.3$

vertical U stirrups $($area of #$3$ reinforcing bar is $0\mathrm{.}11i{n}^2).$ Grade $60$ steel is used for the flexural and shear

reinforcement and concrete compressive strength at $28$ days is $4,000$ psi. Use the load combination

$1\mathrm{.}20**DL+1\mathrm{.}60**LL$ to compute your shear demand.