Direct Answer
Navisworks (Autodesk) is a model review and clash detection application that loads 3D models from multiple sources (Revit, Tekla IFC, AutoCAD) into a single federated view for coordination, clash detection, and construction simulation. For steel fabricators, Navisworks is the most common clash detection tool used by GC BIM coordinators to identify conflicts between structural steel and MEP.
Full Explanation
Navisworks capabilities relevant to steel coordination: (1) Clash Detective — runs automated geometric clash checks between model elements, categorizing clashes by severity and assigning to responsible parties. (2) TimeLiner — links model elements to schedule tasks for 4D simulation. (3) Quantification — extracts quantities from the model. For fabricators, the most important output is the clash report — a spreadsheet listing every structural clash with location, element identifiers, and photos. Each clash should be resolved via RFI before cutting steel.
What This Means for Your Shop
When the GC shares a Navisworks clash report, review structural clashes promptly. Identify which clashes are in your scope (steel-to-steel vs. steel-to-MEP), assess the resolution options, and submit RFIs for structural modifications within 5 business days. Delays in responding to clash reports put your fabrication schedule at risk.
Common Mistakes
Ignoring clash reports from the GC because they 'don't look like structural issues.' MEP clashes with structural steel are your problem too — even if the MEP needs to reroute, you need to confirm the structural steel is in the correct location first.
Recommended Process
Assign one person on your team to be the Navisworks liaison. When clash reports are received, review and categorize all structural clashes within 48 hours. Submit RFIs for conditions requiring structural modifications. Track clash resolutions in your RFI log.