$7\mathrm{.}32$ A $26$ exterior stud wall is $14-$ft tall. Studs are $16-$in$.$ o$.$c$.$ The studs support the following ver$-$

tical loads per foot of wall:

$D=800l\frac{b}{f}t$

$L=800l\frac{b}{f}t$

$L_r=400l\frac{b}{f}t$

In addition, the wall carries a uniform wind force of $15psf($horizontal$).$ Lumber is No$.1$ DF$-$L$.C_M=1\mathrm{.}0,$

$C_t=1\mathrm{.}0,$ and $C_i=1\mathrm{.}0.$ Sheathing provides lateral support in the weak direction.

Find:

a$.$ Check the studs using ASD and the IBC$-$required load combinations. Neglect uplift.

D only

D$+\mathrm{.}75($L$+$Lr$)$

D$+\mathrm{.}75($L$+$Lr$+\mathrm{.}6$W$)$

b$.$ Check the studs using LRFD and the IBC$-$required load combinations. Neglect uplift.

$1\mathrm{.}4$D

$1\mathrm{.}2$D$+1\mathrm{.}6$L$+\mathrm{.}5$Lr

$1\mathrm{.}2$D$+$W$+\mathrm{.}5($L$+$Lr$)$