Forums >> Revit Structure >> Technical Support >> Modeling thickened slab strip under bearing walls

minfante14

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I'm working with a 4" SOG using a CAD underlay.  What is my best approach to place a thickened slab by picking points A to B?  I was hoping to pick start and end points and have the concrete foundation thickened slab placed along the center.  I feel that the slab edge thickened slab will not apply here since they require a slab edge selection.

I figured this would be a great place to ask since I'm pretty sure this has been done before.  Also, please advise if I am not going in the right direction with this and why.

My other thought is this.  Do I need to model walls so that I can use a wall footing family for this, and place by selecting walls?

Any direction is greatly appreciated.

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Marvin L Infante

BIM Technician

Denver Colorado

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WWHub

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Joined: Tue, May 16, 2006
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I had never tried to slove this in a BIM way until now.  This process works.

Whatever you do, you want the element to merge with the floor.  The problem initially is you can't create a family in the floor category except as an in-place family and in-place is too hard to modify.  When you first look at the built-in slab edge category which will join with the floor, you have a problem because you don't have an edge...... Ah-ha ... but it will also let you pick a model line.  Looking at the image left to right where I used a standard thickened edge profile (obviously wrong - slab edge properties are shown):

1. Place model lines where you want your paths (dark green line - first plan - transparent).  (Multiple slab edge paths can be picked in one operation so the thicked areas will join correctly at corners.)
2. Start the floor edge process with the correct profile and pick the 3D line.
3. (second plan) While the plan is transparent, you can use the linework tool to pick what lines you want to show as solids or hidden.  When changed to hidden line view, these lines will now show.
4. Now you can hide the model line.
5. Join the slab edge to the floor and all is good in sections and 3D.

Attached Images

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Thickened slab appearance

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Rebar in a thickened slab Revit 2012

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Thickened Slab Not Cutting Floor Line Out

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Creating slab edge...

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Thickened slab at stoops

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