$9-1.$ If the beam shown below requires web reinforcement to resist internal shear forces, design the

necessary #$4$ stirrups $($utilize a spacing curve$)$ for portion $1-2$ of the given beam. Use ACI Equation

$22\mathrm{.}5\mathrm{.}5\mathrm{.}1($a$)$ for determining the shear strength of the concrete.

$f_c=3,500$

$f_{5t}=50,000$

Supports $=12in.in$ width

$M_{\text{I}\text{L}\text{L}}=200ft-$kips

$M_{1DL}=110ft-$kips

$M_{3LL}=140ft-$kips

$M_{3DL}=100ft-$kips

$PDL=14$ kips

$P_{LL}=14$kips

$WDL=2\mathrm{.}5$kip$\frac{s}{f}t$

$(includes$ beam weight$)$

$w_{LL}=4\mathrm{.}0$kip$\frac{s}{f}t$