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Brazilian structural codes · open source · native app

The whole building.
Free, forever.

Structural analysis and design to Brazilian codes (ABNT): reinforced concrete — NBR 6118 — and structural masonry — NBR 16868 — in one model. Space frame with iterative P-Δ, seismic (NBR 15421), foundations, executive drawings and a full calculation report. A ~3 MB native app for macOS and Windows, MIT-licensed.

Everything a concrete building needs.
No surprise modules.

Analysisspace frame · modal
Automatic space frame (6 DOF/node) with rigid diaphragms, own skyline solver, two stiffness passes (cracked ULS / full SLS), modal analysis, γz and real iterative P-Δ — valid beyond the γz = 1.30 limit.
Design to NBR 6118beams · columns · slabs
Beams with effective flange (automatic T-section), torsion and deep beams; columns in biaxial bending, structural walls and corbels; slabs by grid analysis with full punching shear (interior, edge and corner, with shear studs); stairs, tanks, floor vibration.
Structural masonryNBR 16868 — included
Walls as first-class elements: prism strength per storey, opening groups, wind shear-wall checks with calculated grout and reinforcement, block-by-block elevations (M-20 modulation) and hybrid towers over concrete podiums.
Wind & seismicNBR 6123 · 15421
Wind with digitized drag-coefficient chart, 7.5% accidental torsion and global sway imperfections; full seismic workflow — zones, soil amplification, design spectrum, equivalent lateral forces or response-spectrum (SRSS) — feeding the design combinations.
FoundationsNBR 6122
Footings (isolated, combined, property-line with strap beams), pile caps (1–16 piles), caissons, rafts and retaining walls — editable per column, SPT-based soil-structure interaction, and stepped foundations on sloped terrain with code spacing checks.
Drawings & reportDXF · vector PDF
Executive rebar drawings cut from the real bending diagrams, column elevations, slab plans, foundation details — 1:1 vector PDF with ABNT title block, DXF R12 export, bar schedules, quantities with costs and a complete multi-section calculation report.
AI copilotClaude API or local
A chat that reads your model, runs the analysis and proposes edits you approve one by one. Use the Claude API or a fully local model via Ollama — offline and private.

no sign-up · no license · sha256 published

Download.

  • v0.2.51 · .dmg — Apple Silicon sha256 d90070f3…b98c
  • v0.2.51 · .exe — Windows 10/11 x64 sha256 57000608…1ed3

v0.2.51 · NBR 6118:2023

macOS says the app “is damaged”? That’s Gatekeeper on apps outside the App Store — run xattr -cr /Applications/HyperFrame.app in Terminal, or allow it under Settings → Privacy & Security. Previous: v0.2.50 ↓ · all versions.

Straight
answers.

Is it really free? What’s the catch?

There isn’t one: 100% free and open source (MIT), a permanent project decision. No license, no account, no hidden telemetry — the code is on GitHub.

Does it run natively on my Mac?

Yes — Apple Silicon, no virtual machine. It’s the only structural software focused on Brazilian codes that runs on macOS. Windows too, of course.

Which codes does it cover?

NBR 6118 (concrete), NBR 16868 (structural masonry), NBR 6122 (foundations), NBR 6123 (wind), NBR 15421 (seismic), NBR 8681 (combinations), NBR 6120 (loads) and NBR 14432/15200 (fire). Every check cites its code clause.

Can I trust the results?

Every code module ships with hand-calculated test anchors (480+ tests) and the clause cited in the source. Cross-validation against established software is ongoing and published in the repository — and the engineer’s own review is always required.