Free tools
Quick structural calculators. No sign-in.
Browser-based mini-tools for everyday structural work. Use them freely — when you're ready for the full BIM + FEM + AI workflow, upgrade to the StructArk app.
Slab load takedown
Define a polygon slab with holes, drop columns and beams, and instantly see how the slab pressure transfers — with numbers, in kN.
OpenBeam analyzer
One prismatic beam under any combination of point, moment and distributed loads. Live shear, moment and deflection diagrams plus reactions and reference formulas.
OpenSection designer
Standard rolled shapes plus arbitrary multi-region custom geometries. Live area, principal moments of inertia, section moduli, gyradius — with a pan/zoom 2-D viewport and PNG / SVG export.
OpenLoad transfer (FE)
Sketch a slab on a grid, drop columns, place axis-aligned beams, carve holes — then read live FE shear / moment / axial diagrams plus full reactions. Export the entire drawing as SVG or PNG.
Open2D drawings (Fragment / IFC)
Open a .frag or .ifc model, cut a section, and produce annotated 2D drawings — dimensions, rebar callouts, level marks, hatches. Export to DXF.
OpenRC rebar designer
Design longitudinal and shear reinforcement for rectangular beams, rectangular columns and round columns. Pick hooks, set zones, see the cross-section and elevation live — export to SVG or DXF.
OpenDXF writer (CNC)
Add rectangles and circles with sizes, preview the nested layout, and export a single DXF where every shape sits side-by-side — never overlapping. Import from CSV. Ready for laser / plasma / router CAM.
OpenAbout these free tools
Every tool above runs entirely in your browser — no account, no install, and no data leaving your device. They cover the everyday structural tasks engineers reach for most: taking slab loads down to supports, analyzing a single beam, computing section properties, transferring loads with a small finite-element model, producing 2D drawings from a model, and detailing reinforced-concrete reinforcement.
They are deliberately focused, single-purpose calculators. When you need the full workflow — a linked BIM and analytical model, deterministic linear FEA across a whole structure, IFC / DXF / PDF exports, and the model-aware engineering assistant — open the StructArk app.