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AEC Technology Glossary

Design & BIM

What is Clash Detection?

Clash detection is the automated checking of a coordinated building model for physical conflicts — a duct running through a beam, a pipe occupying the same space as a cable tray. Software flags hard clashes (objects intersecting) and soft clashes (objects violating required clearances).

In practice

Clash detection runs on the federated model during design and preconstruction, turning coordination from visual inspection into a managed issue list. Newer AI tools extend the idea to 2D drawing sets, cross-referencing sheets for conflicts without needing a model.

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