$(10$ pts$)$ Consider the floor plan and building section shown in Figure P$2\mathrm{.}3$ and P$2\mathrm{.}7.$ The

uniformly distributed live load on the floor plan is $60l\frac{b}{f}{t}^2$ on all three floors. Compute

the tributary areas and the live loading for members $($a$)$ floor beam B$3,($b$)$ floor beam

B$4,($c$)$ girder G$4,$ and $($d$)$ interior column C$3$ in the third and first stories. Consider the

live load reduction if permitted by the ASCE standard.

P$2\mathrm{.}3$

r$2\mathrm{.}1$