| A - area |
| Ae - effective area |
| Ag - gross area |
| An - net area |
| Cb - moment gradient factor lateral torsional buckling |
| Cm - bending factor for braced beam-column |
| Cw - warping constant in6 |
| E - modulus of elasticity 29000 ksi |
| EI - flexural rigidity of frame members |
| f - stress |
| fa - axial compressive stress |
| fb - flexural stress |
| Fa - allowable axial compressive stress |
| Fcr - Elastic Buckling Stress (compression & bending) |
| Fe - Euler buckling stress |
| Fn - nominal strength |
| Fu - ultimate tensile stress |
| J - Polar Moment of Inertia |
| K - effective length factor for compression members |
| Lb - unbraced length |
| M1 & M2 - Moments at ends of unbraced member |
| Mn - nominal bending strength |
| Mu - factored-load moment |
| Mr - yield moment = 0.7FyS |
| p - axial strength coefficient |
| P - axial force |
| Pc - available axial strength |
| Pcr - critical buckling load |
| Pe - Euler buckling load |
| Pn - nominal strength |
| Pnt - axial load in beam-column |
| Pr - required axial strength |
| Pu - factored concentrated load |
| S - elastic section modulus |
| rts - weak axis radius of gyration |
| ∅ - resistance factor |
| Δ - deflection second order displacement |
| δ - axial deformation, deflection |