The W$200$ x $59$ A$-36$ steel column shown in Fig. $a$ is fixed at its base

and braced at the top so that it is fixed from displacement, free to

rotate about the $y-y$ axis. Also, it can sway to the side in the $y-z$

plane. Determine the maximum eccentric load the column can

support before it either begins to buckle or the steel yields.

Take $E=200$GPa and ${}_y=250$MPa.

can you explain the y$-$y axis buckling and how to draw it$,$ as well as the x$-$x axis yeilding.

also why is y$-$y axis considered buckling and x$-$x axis considered yeilding?