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Structural Calc
2D Truss Solver
EngineeringRuns in your browserBuy Once · Own Forever
About
Solves 2D pin-jointed trusses using the Direct Stiffness Method — the same linear algebra used in professional FEA software.
Visual drag-drop canvas, color-coded member forces (tension/compression), PDF export.
Available offline on your phone.
What's Included
- ✓Solve 2D pin-jointed trusses using the Direct Stiffness Method
- ✓Visual drag-and-drop canvas for node and member placement
- ✓Color-coded member forces — tension blue, compression red
- ✦Unlimited members, visual canvas, and encrypted project save/load.
Everything above is included in a single one-time purchase. No subscription. No in-app purchases. No feature gating.
Pricing
In your browser
Free
The full tool, not a trial. No account, no time limit, nothing leaves your device.
Tidemill Pro · optional
$12 once
Encrypted backup and restore across all 33 tools. One payment, no subscription.
Pro only adds backup. Nothing that is free today will move behind it. What Pro includes →
Get It
🌐Free · full toolTry Web Version →
Full tool — runs entirely in your browser. No account, no install.
Native iOS and Android builds are planned. The web version above is the complete tool today. Questions? Support →
Privacy
- ◆No account required — open the app and use it
- ◆No internet connection needed — fully offline
- ◆All data AES-256 encrypted on your device
App Info
Keywords
trussstructuralengineeringbeamstiffnesscivilforces
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