When a substrate layer is added to a floor's structure, it will cut the slab edge, rather than the edge cutting through and directly attaching to the slab. While some of you may be aware of possible ways to work around this, I wanted to relay a method as I still see the question float around.
The following screenshot shows the default behavior when you add an edge to a slab with a substrate layer:
To have the edge cut through that layer, first Unjoin the geometry:
Then Join it, making sure to select the edge first and then the slab:
I hope this helps!
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Why isn't this the default behaviour?
The slab edge would preferable automatically cut the floor rather than the floor automatically cutting the slab edge. Or don't join them at all and leave it up the user to decide.
Posted by: CJ | September 06, 2010 at 05:15 AM
Hi CJ, it actually used to be the default behavior pre-2009. In Revit 2009 the design was changed so the host slab cut the edges - but it was implemented based on a single layer slab element, so this was an unfortunate consequence. There is an existing request item to improve the default behavior going forward. If you would like to request the same, I encourage you to do so at http://www.autodesk.com/feedback.
Posted by: Kathryn Langan | September 10, 2010 at 09:16 AM