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A W$8$x$67$ is used as a column. The weak axis is braced at $30$ ft from the bottom and the bottom end condition is fixed in all directions. The top is pinned in all directions and weak axis bracing is pinned. Find the critical load of buckling and the critical stress of buckling.

Total Length $=50ft.$

$r_x=$

$ry=$

$2\mathrm{.}12$ in

critical case