Collision Detection

Issue the Design > MEP Modeling > Find Collisions command. This command is available in the Floor Plan and 3D windows.
Note that once you correct a collision, you should delete it from the list of Mark-Up Entries. Otherwise, the next time you run the Collision Detection, ARCHICAD will continue to list the corrected collision as a “problem area.”
Collision Detection does not include non-visible elements (those on hidden layers).
Collision Detection also takes the elements’ Building Materials into account: Building Materials in ARCHICAD (Options > Attributes > Building Materials) have a tag for “Participates in Collision Detection”. This checkbox is on by default.
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