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Slope part of foundation slab

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Nachricht 1 von 13
Anonymous
3844 Aufrufe, 12 Antworten

Slope part of foundation slab

How can I slope just a part of my foundation - ie the garage. I have added two split lines for the garage itself, but it won't allow me to add a slope just to the garage area. What am I doing wrong?

 

Screenshot_5.png

 

Thx,

Marc

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Nachricht 2 von 13
barthbradley
als Antwort auf: Anonymous

Get rid of the slope arrow and close out of sketch mode. Then use Modify Sub Elements to accomplish what you want.

Nachricht 3 von 13
RDAOU
als Antwort auf: Anonymous

@Anonymous

 

I would use two slabs...instead of adding split lines i would literally split them into two, and have a separate slab for the sloped area with modified sub-elements

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Nachricht 4 von 13
barthbradley
als Antwort auf: RDAOU

Doing it Rob’s way would negate even having to use Modify Sub Elements. Just use the slope arrow when you sketch new boundary – unless, of course, you have more than one slope direction. 

Nachricht 5 von 13
Anonymous
als Antwort auf: Anonymous

Thx guys - I decided to go the separate slab route. I have several other slab drops in this foundation for walk-in showers and some water features so had to do this on other areas too. For an area like the garage on the low-slope side: To build the curb there, is there a difference between using a beam vs a slab for something like this?

Nachricht 6 von 13
ToanDN
als Antwort auf: Anonymous

For the curb, I would just build a concrete wall a few inches tall and attach its base to the slab.

Nachricht 7 von 13
barthbradley
als Antwort auf: Anonymous

Our curb walls are walls and our garage slabs are floors. Or do I misunderstand you? 

Nachricht 8 von 13
barthbradley
als Antwort auf: ToanDN

Toan, curb walls are generally the height of the foundation slab (slab on grade construction here in NorCal) and the top of garage slab is 4" below the top of foundation slab at its high point. In the field, the curb walls and foundation slab are done in the same pour, and the garage slab later. 

Nachricht 9 von 13
ToanDN
als Antwort auf: barthbradley

Barth - I don't see it contradicts with using a concrete wall to model a curb. TO wall can be @ 0 and BO wall can be @ TO depressed slab. Then join them for a clean geometry.

Or you think there is a need to model them in the same sequence as construct them in field?
Nachricht 10 von 13
barthbradley
als Antwort auf: ToanDN

Toan, “garage curb wall” and “garage stem wall” are interchangeably used to describe the concrete wall around the perimeter of the garage area. It is generally 8” wide, and the same ground depth and height of foundation slab immediately adjacent to it (generally 8” above grade here in NorCal).  Between those walls and foundation slab sits the garage slab. The top of garage slab is 4” below the top of the walls/foundation at its highest point. That is what I, and I believe Marc, were referring to – not a “curb” in the pedestrian sense.  

Nachricht 11 von 13
ToanDN
als Antwort auf: barthbradley

Yeah I know what he meant and we have been talking about the same thing apparently. I know a curb wall and a sidewalk curb are different things.
Nachricht 12 von 13
barthbradley
als Antwort auf: ToanDN

Alright; we’re good then. Cheers!

Nachricht 13 von 13
Anonymous
als Antwort auf: barthbradley

Dear Barth,

I am having the same problem, and I need to conserve the category of the slab as "Structural Foundation", and when trying to model a foundation slab, there is no option to modify sub-elements.

 

 

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