Steel Columns subject to axial force and flexure about both axes design are explained in detail under this title.
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Symbols
Pr = required axial strength determined using LRFD or ASD load combinations, kips (N)
Pc = available axial strength, kips (N)
Mr = required flexural strength, determined using LRFD or ASD load combinations, kip-in. (N-mm)
Mc = available flexural strength, kip- in. (N-mm)
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Design axial strength,
(LRFD)Mathinline body $$ \normalsize P_c =\phi_c P_n $$ Allowable axial strength
(ASD)Mathinline body $$ \normalsize P_c =P_n/ \Omega_c $$ Design flexural strength,
(LRFD)Mathinline body $$ \normalsize M_c =\phi_b M_n $$ Allowable flexural strength
(ASD)Mathinline body $$ \normalsize M_c =M_n/ \Omega_b $$
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