Structural steel fabrication from BIM requires an IFC workflow that transfers not just geometry but connection details, bolt grades, weld specifications, and material certifications. The path from Revit structural model to steel fabrication shop drawing involves multiple software tools and IFC handoffs.
Why This Matters
Steel fabricators who receive geometric IFC without connection and material data must re-engineer details that are already decided in the structural design. This duplication of effort introduces errors and delays fabrication. A properly configured structural steel IFC handoff eliminates this redundancy.
Practical Guidance
Revit to Tekla Workflow: The most common steel fabrication BIM workflow transfers from Revit Structure to Tekla Structures for detailing and fabrication. Use the Tekla-Revit link or structural IFC as the exchange format. Confirm which elements transfer correctly and which require manual recreation in Tekla.
Connection LOD: Revit structural models typically deliver LOD 300 steel — correct size and position but no connection detail. Tekla delivers LOD 400 with connections. Define in the BIM Execution Plan where the LOD handoff occurs and who is responsible for connection design.
IFC Property Sets for Steel: Structural steel IFC files should include property sets for steel grade (S275, S355, ASTM A36), section profile (HEA, IPE, UB), surface treatment, and fire protection specification. Fabricators need this data to produce material orders and protective coating specifications.
Drawing Production from IFC: Tekla can produce fabrication shop drawings directly from the detailed structural model. These drawings reference the IFC element GUIDs, creating a traceable link from design IFC to fabrication drawing to manufactured element.
Checklist
- Define LOD handoff point between design structural model and fabrication detailing model
- Include steel grade, section, and surface treatment in IFC property sets
- Test Revit-to-Tekla IFC transfer on sample connections before full model handoff
- Confirm GUID traceability between design IFC, fabrication drawings, and shop model
LUA BIM LABS Insight
Steel fabrication from BIM only delivers value when the IFC carries the engineering data, not just the geometry — configure property sets from the start.
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