Question: Determine the LRFD design strength and the ASD allowable strength for a W 1 2 x 6 5 ( ASTM A 9 9 2 )

Determine the LRFD design strength and the ASD allowable strength for a W12x65(ASTM A992) column with L=35 ft with a fixed support at top and pinned support at bottom.
a) Determine whether the section is slender or nonslender.
b) Calculate the LRFD and ASD strengths using the equations of AISC Section E3.
c) Using critical stress values in Table 4-22 of the AISC Manual, determine the LRFD and ASD strengths and compare with part b).
d) Repeat the problem using Table 4-1 of the AISC Manual and compare with parts b) and c).
e) If supports are added to brace the column in the weak axis only at 10 ft and 20 ft from the bottom support, determine the new LRFD and ASD strengths using the critical stress values in Table 4-22. Repeat the problem using Table 4-1 of the AISC Manual. Discuss how the added braces affected the column strength.

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