calcnote ACI 318-19
Methodology Run a calc

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.

Run a calc See sample output ↓

Verified per ACI 318-19 — read the methodology

Project: 12-story tower
Engineer: John Doe, P.E.
Date: May 9, 2026
Page: 1 of 2
Design inputs
b12 in
h12 in
f'c10 ksi
fy60 ksi
Pu400 kip
M₂40 k-ft
P-M Interaction Diagram
M [kip-ft] P [kip]
Capacity Check: Pass
ACI 318-19 compliant
Independently verified
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.

Pro tier · in development

Calculation-aware narrative drafts with rigorous ACI clause citations. Pricing under discussion — pay-per-calc, credits, or monthly. Join the waitlist to influence the shape and get early access.