CalculusA 3D workbench for structural engineers.

The structural model, its analytical model and results, drawings and references in one project, on the desktop and on the web.

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What is Calculus?

Open the editor

Structural model

Beams, plates, bolts, welds, rebars, cut parts and cut planes, grids and annotations, with European profiles, materials, bolt assemblies and rebar grades.

Analytical model and FEM

Derive the analytical model from the structure or draw it directly. 1D and 2D members, supports, loads, load panels, EN 1990 combinations. Linear static and linear stability analysis, results in the same scene.

Drawings

Pages with viewports into the 3D model and per-kind style rules, exported to vector PDF.

References and exchange

Place IFC, DWG, DXF, PDF, point clouds and meshes to model against. Export IFC 4 / 4x3, import and export SAF, round-trip with Tekla Structures.

Library and extensions

Catalogs travel inside the project. Components, custom properties and commands are script modules you edit and save in the editor.

Open to scripts and agents

The .calculus file is readable JSON. The desktop app serves open models to agents and scripts over MCP and REST.