$5\mathrm{.}2$ Given: Column F$-1$ in Steger Building. DL $95$ PSF$,$ LL $40$ PSF$,$ Snow $=25$ psf$,$

Fa$$ade load $100$ psf$,L=18ft,$ Total building height $=250ft$

F$-$E ${22}^{\text{'}}-5^{\text{'}\text{'}},1-{324}^{\text{'}}-5^{\text{'}\text{'}},19$ floors and roof.

Find: Loads and most economical W$-$ shape section

a$)$

$P_D=$

$P_L=$

$P_U=$

b$)$ W$-$shape $($A$992)$

shape:

${}_c{P}_n$:$.$