Problem Solving Session$-1$

Applying the ASD load combinations recommended by the AISC, determine the load to be used for the roof system

Where D$=400$ lb$/$ft$,$ Lr or S or R $=270l\frac{b}{f}t,W=288l\frac{b}{f}t.$ assume that wind can be plus or minus.

D

$D+L$

or $S$ or $($:$R\}$

or $S$ or $($:$R\}$

$D+(0\mathrm{.}6W)$

or $S$ or $($:$R\}$

$0\mathrm{.}6D+0\mathrm{.}6W$

$1\mathrm{.}0D+0\mathrm{.}7E$

$1\mathrm{.}0D+0\mathrm{.}525E+0\mathrm{.}75L+0\mathrm{.}75S$

$0\mathrm{.}6D+0\mathrm{.}7E$