Please answer, and show all work.

a$)$ For any design problem you must outline your steps and briefly describe them prior to doing the steps.

b$)$ All Units must be clearly shown.

c$)$ Please box your final answers.

d$)$ Clearly write down the reference equation numbers$/$pages from the AISC manual whenever you use

them.

Using LRFD select an American Standard Channel, Single Angle and Double Angle for the

following tensile loads: $(30$ points$)$

a$.DL=54$kips;$LL=80$kips;$WL=75$kips.

b$.$ Use an estimated $U$ factor

c$.$ The length is $15ft.$

d$.$

Derive the Euler Buckling Load and the Euler critical buckling stress for a column fixed at one

end and free at the other $-$ cantilever column.

Note: We did this problem for a simply supported column in class. Only the boundary conditions

will change.