Question $2.[8$ points$]$

Select the lightest $W$ section as a beam. Assume only flexure must be considered. The dead load given is in addition to the weight of the beam.

The service dead load is $0\mathrm{.}7$kip$\frac{s}{f}t,$ live load is $1\mathrm{.}4$kip$\frac{s}{f}t,$ the beam has lateral support at the ends and midspan, and $F_y=60$ksi.