calcnote
ACI 318-19 reinforced concrete column calc-notes. Generated and reviewed in under a minute.
Whitney stress block, dynamic φ per §21.2.2, slenderness gate, PASS/FAIL: all in a Word document an engineer of record can sign and seal.
Project: 12-story tower
Engineer: John Doe, P.E.
Engineer: John Doe, P.E.
Date: May 9, 2026
Page: 1 of 2
Page: 1 of 2
Design inputs
b12 in
h12 in
f'c10 ksi
fy60 ksi
Pu400 kip
M₂40 k-ft
P-M Interaction Diagram
Capacity Check: Pass
ACI 318-19 compliant
Engineer-signable
Free tier available
How it works
1. Enter inputs
20 fields per column: geometry, materials, reinforcement, factored loads.
2. Run the math
Whitney stress block, dynamic φ, P-M interaction polygon: all deterministic, all cited to ACI 318-19.
3. Download .docx
Ready-to-sign calc-note with equation walkthrough, P-M diagram, PASS/FAIL verdict, footer disclaimer.
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