Build structure ideas before BIM gets heavy.
PreBIM-SteelStructure is a lightweight, web-based steel structure concept modeler for fast iteration: grids/levels, sub-beams, bracing, rough quantities & export — so you can explore options and explain intent in minutes.
Fast modeling · clear quantities · practical exports
preview
ModelGrid + levels
ExploreBracing / overrides
ExportDATA / STAAD / DXF
Fast concept modeling
Define grid spans and levels, generate a steel frame instantly, and iterate in seconds.
Bracing + overrides
Add bracing by selecting panels, override member profiles, and see results update immediately.
Quantities + exports
Track weight and counts in real time. Export DATA (JSON), STAAD (.std geometry) and DXF (auto‑dimension).
Made for early decisions
Communicate intent fast
Use a lightweight model to align spans, levels, bracing strategy, and rough steel quantities before detailed BIM.