A double$-$tee supported by an L$-$beam is loaded as shown in the figure.

Design Code:

ACI $318$: Building Code Requirements for Structural Concrete, $2014.$

The magnitude of the ultimate torsion $($ft$-$kips$)$ induced into the L$-$beam, by superimposed dead and live load applied on the double$-$tee, is most nearly:

SUPERII

A$.,18\mathrm{.}7$

B$.21\mathrm{.}4$

C$.28\mathrm{.}6$

D$.32\mathrm{.}8$