Sample result
This is a live sample output for a 16×16 in rectangular tied column with 8-#9 longitudinal bars (f′c = 5,000 psi, Grade 60), checked per ACI 318-19 under Pu = 200 kip and M2 = 60 kip-ft. The same section is verified against StructurePoint's published spColumn reference — see the verification report and the methodology. Run your own column to get an editable .docx calc-note.
Both axial and moment D/C ratios ≤ 1.00.
P-M interaction diagram
Demand (Pu, M₂) tested against the φ-reduced capacity polygon. Operating point (φPn, φMn) shown on the boundary.
| Quantity | Value |
|---|---|
| Pu (factored axial demand, kip) | 200.00 |
| φPn (axial capacity at operating point, kip) | 562.55 |
| M2 (factored moment demand, kip-ft) | 60.00 |
| φMn (moment capacity, kip-ft) | 168.77 |
| D/C axial | 0.36 |
| D/C moment | 0.36 |
| kl/r | 25.00 |
| kl/r limit | 34.00 |
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