Steel Structure Calculator — LRFD Steel Design Suite

// AISC LRFD Steel Design Suite

Verify structural capacity before you spec it.

Shape properties, beam capacity, column buckling, and connection strength — computed instantly on your phone, checked against AISC LRFD provisions.

See the modules Privacy policy

d = 180 mm

bf = 140 mm

ISMB 200

// Calculation modules

Five checks, one workflow

Shape Properties

Elastic/plastic section modulus, moment of inertia, radii of gyration.

Section lookup

Beam Load Capacity

Flexure, shear, and deflection under applied loads.

AISC Chapter F/G

Column Buckling

Critical buckling stress, nominal load, slenderness limits.

AISC Section E3

Connection Capacity

Bolt shear and fillet weld design strength.

AISC LRFD

Steel AI Advisor

Conversational reference on AISC provisions, using your own AI provider key.

BYOK

// About

Built for the estimating stage

Instant results

No spreadsheets — enter member properties and get a checked capacity in seconds.

Unit-flexible

Switch between metric and imperial without re-entering your inputs.

Runs on-device

Calculations happen locally; your project data isn't uploaded anywhere.

Bring your own AI key

Connect Groq, Gemini, OpenRouter, or Claude for the AI Advisor — your key, your account.

Educational reference tool. Steel Structure Calculator is intended for educational reference and preliminary estimation only. It must not be used for real-world construction designs without verified, stamped calculations from a licensed structural engineer. Always check results against the governing code standard (AISC, Eurocode, IS 800, etc.).

Steel Structure Calculator

Thursday, July 23, 2026