Structural today · MEP & Civil coming soon
Engineering calculations you can verify, defend, and sign.
Fill the inputs, get a stamp-ready PDF — self-contained, code-referenced, and repeatable. Run individual modules in your browser, or work whole projects in PerCode Desktop with linked load paths and combined reports. The engineer stamps; the AI never does.
21-day free trial · No credit card · Stamp-ready reports
Why PerCode
Built for how engineers actually work
An AI assistant that actually helps
Describe a member in plain English and the form fills in seconds. After the calc runs, the AI reviews your inputs and results for the classic mistakes that get calcs rejected — wrong code edition, load-combo gaps, unit slips. Advisory only; it never edits silently and never appears on the stamped report.
Reports you can defend
Every calculation is self-contained, code-referenced, and repeatable — the way good engineering practice demands. Tailored and verified against state codes and national standards, so your reports hold up at plan check.
Built for how small firms actually work
Fewer clerical mistakes, faster changes, cleaner reports, fewer permit comments. Productivity for solo PEs and small teams — not another black-box AI toy.
The AI assistant
Describe it once. Review. Calculate.
Type a member in plain English and the form fills in seconds. After the deterministic calc runs, the AI reviews inputs and outputs for the classic mistakes that get calcs rejected — and flags them for you to verify.
The AI fills the form; the engineer runs the calc and stamps it. The AI is never in the calculation loop and never appears on the report.
AI assistant — illustrative
You: “SYP No.2 2x10 joists @16″, 14 ft span, 40 psf LL.”
PerCode: Filled species, grade, size, spacing, span, and live load. ⚠ Verify: confirm the code edition matches your AHJ.
Static preview. Live demo coming with the calculator directory.
How it works
From a plain-English description to a stamp-ready report
Step 1
Describe
Tell the AI your member in plain English. It fills the form in seconds.
Step 2
Review
Check the inputs. You stay in control of every value.
Step 3
Calculate
The deterministic engine runs the code checks and shows every step.
Step 4
Defend
Get a stamp-ready report — with the AI flagging rejection-prone mistakes to verify.
One platform, two ways to work
Run a module in the browser. Run the whole project on the desktop.
In your browser
PerCode Web modules
Single-purpose modules — concrete, wood, steel, cold-formed steel, masonry, walls, footings, ASCE 7-22 wind. Fill the inputs, get a stamp-ready PDF.
PerCode Desktop
The whole project on your machine
A Project Manager that owns your project folder, linked load paths, combined reports next to your drawings, batch runs, and offline work — plus the canvas-based modules (Building Analysis, Truss Design) that need a drawing surface and AI vision. Your data stays on your machine.
Both are part of your subscription — same account, modules unlock by your plan.
Calculate faster — and defend every report.
Start your 21-day free trial today. No credit card to begin, no long-term lock-in — upgrade when it pays for itself.
Start free trial