Problem $5$

The rectangular steel frame shown is to support a footbridge in a chemical plant. The ends

of the bridge are supported on rollers, so the bridge is permitted to sway $($unbraced frame$).$

All members are oriented with their webs in the plane of the frame $($or such that bending

will occur about the strong axis$).$ All columns are assumed to be adequately braced in the

weak direction. All beams are W$16$x$50.$ Assume $=1\mathrm{.}0($elastic behavior$).$ Determine the

design compressive strength of column FB $($W$8$x$48).$ Use the LRFD Method.

Problem $5$