Problem $4(25\%)$

Compute the nominal compressive strength for a WT$10\mathrm{.}591$ with an effective length of $18$ feet with

respect to each axis. Use A$992$ steel and the procedure of AISC Section E$4.$

Note: no score will be given if you used the column load tables, you may use it however, to check part of

your solution. You may also use CalcBook, however; detailed hand calculations for flexural buckling

strength about the $x-$axis, flexural buckling strength about the $y-$axis and flexural torsional buckling

about the $y-$axis should be presented for full credit.Problem $3(25\%)$

A $35ft$ column is fixed at the top and fixed at the bottom, and has additional pinned supports in the weak

axis direction at a point $10ft$ and $20ft$ from the bottom. Assume the column is part of a braced frame.

Axial gravity loads are $P_D=85k$ and $P_L=125k.$ Choose the lightest $W8$ column. Use $50$ksi steel.

Use CalcBook to try out sections, then show detailed calculations of your selection. Then, verify your

selection from Table $4-14.$