Tuesday, March 20, 2012

Quick Slab Depression

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...

Model it!

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.
Like architecture, great software doesn't just happen, it is designed
Revit is designed to be expansive. Operations are consistent, logical and intuitive. Learning is incremental and the curve is steep - which means users achieve high productivity in a relatively short time.

1 comment:

  1. Well I would do two Slabs and set a different floor above. Why are you modelling this with so much effort? This only makes sense, when you have a sloped thing going on.