Problem $2(30\%)$

Select the lightest W$6$ section that will resist a tensile dead load and live load of $50k$ and $70k,$

respectively. The member is to be $20ft$ long and is assumed to have two lines of holes in each flange and

one line of holes in the web. Assume there are four bolts in each line $3$ in on center. All holes are for $7/8-$

in diameter bolts. Use A$992-$Grade $50$ steel.

Make sure to check tensile yielding, tensile rupture, and slenderness ratio limit