Examples: real models, real results
Everything below runs live in your browser on the FERS finite-element engine — interactive 3D models, a fully worked Eurocode 3 check, and the validation suites that keep the solver honest.
Interactive 3D viewer examples
Open a complete model, run the calculation and inspect the results — no account needed.
A 10-node, 21-member steel shed. Run the analysis in your browser, then inspect reactions, N/V/M force diagrams and the deflected shape on the real 3D model.
A ballasted PV mounting structure. Explore member forces and displacements on a model with realistic load cases.
Want to change the model itself? Open the editor with the shed example.
Worked design example
Validation
Don't take the results on faith — the solver is continuously checked against published benchmarks and closed-form solutions.
Free calculators
Quick single-purpose tools, each cross-checked live against the same finite-element engine.
Draw any 2D beam or frame and get support reactions, a free-body diagram and axial, shear and bending-moment diagrams.
Maximum bending moment, support reactions and deflection for a central point load or a uniformly distributed load.
Fixed-end bending moment, reaction and tip deflection for an end point load or a uniformly distributed load.
Support and midspan bending moments, reactions and deflection for a fixed-fixed (encastré) beam.
Fixed-end and span bending moments, both reactions and deflection for a fixed-pinned beam.
EN 1993-1-1 unity check for an IPE/HEA/HEB beam — bending, shear, N+M and lateral-torsional buckling utilizations, solved live with a per-clause trace.
Describe a steel beam in plain English and get an EN 1993-1-1 check computed by the real FERS solver — a limited free demo (a few messages per day); connect your own LLM via MCP for unlimited use.
Python examples
Prefer code? The open-source fers_core package ships runnable example scripts for every feature.
Build, solve and post-process models from Python — the same engine as the browser app.
Build your own model
3D frames and trusses, load combinations, Eurocode EC3 checks and calculation reports — free tier, no install.
Wondering which axis is up or why the strong axis is called z? See the conventions & units reference.