I'm working on a building that has several areas where the concrete floor slab must be depressed for ceramic tile finish and sloped for drainage. It would be easy to place a couple of hidden lines on the floor plan, drop in a 2D floor drain, and be done with it. That's what I did on the first pass. I soon realized that the slab depressions would also need to be shown on several other drawings: Slab Plan, Export Plan, Enlarged Plan, etc.
The general guideline for Revit is that if an object or feature appears in more than one view...
I created a floor-based generic model containing a void extrusion with instance parameters to control the length, width and depth. I used symbolic lines for the hidden "slope to drain" lines as I prefer them to appear in plan only. I copied the generic annotation from the Floor Drain family and used equality constraints to locate it in the center of the family. Yes/no visibility parameters (Show Drain; Show Lines) allow the appearance of these to be controlled in the model.
As with all basic Revit families, this is just a starting point. The possibility for further development is apparent.
- Multiple floor drains.
- Sloped slab using a void blend below the extrusion.
Download 'GEN_Slab Depression.rfa from the Files and Families tab above.
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