To Add an Interference Condition to a Curtain Wall

Use this procedure to add an interference condition to a curtain wall. Interference conditions use the geometry of 3D objects to create custom openings or cutouts in curtain walls. You can specify how the interference condition is applied to the curtain wall: added to the curtain wall, subtracted from the curtain wall, or ignored.

You can specify whether the interference condition applies to an infill, frame, or mullions of a curtain wall.

1. Place the object in the location where you want to specify the interference condition.
2. Select the curtain wall to which you want to add an interference condition.
3. Click Curtain Wall tab Modify panel Interference drop-down Add.
4. Select the object intersecting the curtain wall, and press Enter.
5. Specify to which curtain wall component the interference should be added:

   If you want to add the interference condition …	Then …
   to the infill	enter y (Yes) when prompted for the infill component.
   to the frame	enter y (Yes) when prompted for the frame component.
   to the mullion	enter y (Yes) when prompted for the mullion component.

6. Press Enter.