For Problems $8\mathrm{.}11$ to $8\mathrm{.}19,$ for the beams and loads given, select stirup spacings if $f_c^{\text{'}}=4000$ psi normal$-$weight concrete and $f_{yt}=60,000$ psi. The dead loads shown include beam weights. Do not consider movement of live loads unless specifically requested. Assume #$34$ stirrups unless given otherwise.

Problem $8\mathrm{.}11($One ans. $1$ @ $6in.,10$ @ $12in.$

$w_D=1\frac{k}{f}t$

$w_L=2\frac{k}{f}t$