Clash Detection

Using Clash Detection

Clash Detection finds intersections between two loaded models so you can catch coordination issues before they reach the site. It's a panel inside the BIM comparison viewer, reached from the Site Dashboard (see the Progress Tracking guide for the viewer itself), and is disabled by default — it needs to be turned on for your platform.

1. Running a Detection

1. Pick Your Models:

• Select Model A and Model B from the models currently loaded (at least two are required). 2. Configure Ignored Categories (optional):
• By default, categories like spaces, openings, annotations, grids, and virtual elements are excluded from results. Adjust this if needed. 3. Run Detection:
• Click Run detection. A progress bar tracks the phases: reading model geometry, filtering candidate pairs, and testing intersections. If detailed geometry isn't available, it automatically falls back to a bounding-box-only pass.

2. Reviewing Results

• Each detected clash appears as a numbered pin in the 3D scene, matching a row in the results list.
• Filter results by review status: Open, Reviewed, Resolved, or Ignored (your filter choices are remembered per model pair).
• Step through clashes with next/previous or the J/K keys.
• Use Isolate to hide everything except the clashing pair, and toggle Markers visibility as needed.

3. Acting on a Clash

• Use Create task on any clash to open a task-creation sheet, pre-filled with a screenshot and both clashing elements attached.

4. Re-Running Detection

• Running detection again reconciles against the previous run and reports how many clashes are new, unchanged, or resolved — so you can track coordination progress over time.