Consider a W$18$x$35$ section made of A$992$ steel that is used as a compression

member. It is simply supported and laterally braced at the ends with warping

unrestrained. For this condition, all unbraced lengths are assumed to be equal $(L_{cx}=$

$\{$:$L_{cy}=L_{cz}).$

a$.$ For pure compression loading, use the $2022$ AISC Specification to calculate and

plot the nominal compression strength curves vs$.\{$:$L_c)$ for four different

buckling modes: strong$-$axis flexural buckling, weak$-$axis flexural buckling,

torsional buckling and constrained$-$axis torsional buckling. For CATB, assume

that the constraining axis is located at the intersection of the centerlines of the

web and one of the flanges. Plot for $L_{c}50ft.$