Input
Compression strength.
Results
Pr / Pc ratio—
Governing equation—
LHS value—
Demand-Capacity Ratio (DCR)—
Method
AISC 360 §H1.1 — for symmetric members subjected to axial + bending: If Pr/Pc ≥ 0.2 → Eq. H1-1a: Pr/Pc + (8/9)·(Mrx/Mcx + Mry/Mcy) ≤ 1.0. If Pr/Pc < 0.2 → Eq. H1-1b: Pr/(2·Pc) + (Mrx/Mcx + Mry/Mcy) ≤ 1.0. Use Pr,Pc tension or compression (positive). Mr and Mc include amplification for second-order effects (Cm, B1, B2).