The beams, e$.$g$.,$ B$1($typ$.),$ are also cast with fc $=5,000$ psi $($normal weight concrete, $150$ pcf$.($B$1=0\mathrm{.}8).$ Use d $=$ h $-3",$ for both positive and negative bending.

$($a$)$ Determine per ACI$318$ the effective flange width $($be or by$)$ of a typical beam, B$1,$ subjected to positive bending.

$($b$)$ Use where applicable a be $($or bf$)$ of $76-$in $[$i$.$e$.,$ ignore the one calculated in part $($a$)],$ compute the minimum flexural reinforcement required $($i$.$e$.,$ As min$)$ and its corresponding design bending $($M$,)$ of B$1$ for positive bending only.

$($c$)$ Use where applicable a be $($or b$,)$ of $76-$in $[$i$.$e$.,$ ignore the one calculated in part $($a$)],$ compute the maximum flexural reinforcement required $($i$.$e$.,$ As max$)$ and its corresponding design bending $($M$.)$ of B$1$ for positive bending only. Use & $=0\mathrm{.}005.$

$($d$)$ If No$.4$ U$-$stirrups at $8"$ on$-$center are used for B$1,$ determine the design shear capacity $($oV$,)$ of the beam.