Structural Design Software for Modern Engineers
Cross-section analysis and concrete design — all in your browser. Built on AS 3600:2018, with more design codes and cold-formed steel design on the way.
Numbers you can put your name on.
Every engine is checked against a public ground-truth corpus spanning AS 3600, EN 1992 and ACI 318. Correctness is verified, not asserted.
815 ground-truth benchmarks — see the corpus- One path, screen to PDF
- The value on screen and the value in the report are computed once, from the same code path — the UI and the PDF cannot disagree.
- Every result cites its clause
- Each check names the standard clause it applied and the load combination it used, so a reviewer can trace the number, not just trust it.
- Refuses rather than fudges
- When a result cannot be computed correctly for the inputs, the tool disables it and explains why — never a plausible-but-wrong number.
Design Tools
Purpose-built tools for cross-section analysis and member design.
GCS — General Cross Section
AvailableDraw arbitrary cross-sections on a CAD canvas. Calculate area, centroid, moments of inertia, section moduli, principal axes, and more.
- Arbitrary polygon sections
- Principal axis analysis
- Composite sections
- PDF reports
ACS — Advanced Concrete Section
AvailableReinforced, prestressed, and post-tensioned concrete section design with biaxial interaction and fire design.
- M-N interaction diagrams
- Moment-curvature analysis
- Fire design (2D FEM)
- Crack width checks
LGS — Light Gauge Steel
Coming SoonThin-walled section analysis with Vlasov theory, FSM buckling curves, and Direct Strength Method design checks.
- Vlasov section properties
- FSM buckling analysis
- DSM design checks
- Multi-code support
Concrete Column Designer
Coming SoonReinforced concrete column design with biaxial bending, slenderness effects, and code-compliant detailing.
- Biaxial bending
- Slenderness effects
- Code-compliant detailing
- Multi-code support
Concrete Beam Designer
Coming SoonReinforced concrete beam design with shear, torsion, and deflection checks.
- Shear design
- Torsion checks
- Deflection checks
- Crack control
Concrete Wall Designer
Coming SoonReinforced concrete wall design for in-plane and out-of-plane actions.
- In-plane actions
- Out-of-plane actions
- Boundary elements
- Multi-code support
How It Works
Create a Project
Organise your work into projects. Each project contains the tools and sections for a specific structure.
Add Design Tools
Choose from the available tools — GCS and ACS — and add them to your project.
Design with Confidence
Draw sections, assign materials, run analyses, and generate professional PDF reports with full code references.
See it in Action
GCS — General Cross Section
- Draw arbitrary cross-sections on a CAD canvas
- Calculate area, centroid, inertia, section moduli
- Principal axis and composite section analysis
- Professional PDF reports
LGS — Light Gauge Steel
- Vlasov thin-walled section properties
- Finite strip method buckling analysis
- Direct Strength Method design checks
- EN, AS/NZS, and AISI code support
ACS — Advanced Concrete Section
- M-N interaction diagrams (biaxial)
- Moment-curvature analysis
- Fire design with 2D thermal FEM
- Crack width and deflection checks
PDF Reports
- Professional calculation reports
- Full code clause references
- One-click generation from any tool
- Suitable for checking and documentation
Design Standards
Grouped by tool, with edition years. AS 3600:2018 is available now; more codes are on the way.
ACS — Advanced Concrete Section
- AS 3600:2018 Available
- EN 1992-1-1:2004 Coming Soon
- ACI 318-19 Coming Soon
LGS — Light Gauge Steel
- AS/NZS 4600:2018 Coming Soon
- AISI S100-16 Coming Soon
- EN 1993-1-3:2006 Coming Soon
GCS — General Cross Section
Pure section-property calculation — not tied to any design code.
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