A$.60ft-k$

B$.180ft-k$

C$.240ft-k$

D$.540ft-k$

QUESTION $19$

If A$992$ steel is used for the B$1$ beam in the last question, what is the minimum section modulus required of beam B$1,$ assuming the steel allowable bending stress is $33$ ksi,?

A$.5\mathrm{.}5i{n}^3$

B$.16\mathrm{.}4i{n}^3$

C$.21\mathrm{.}8i{n}^3$

D$.65\mathrm{.}5i{n}^3$