Open Below causes Foundation to Change

[ronmckie]

I have a 1 story w/basement. I put stairs into the basement and before I put in a stairwell, the 1st floor is a closet. I check my foundation and it is OK (no jogs or deviations). I then put in a stairwell (Open Below) and now my foundation has changed for that room. What did I do wrong? When I change back to a closet, my foundation goes back to normal.

Thanks

Ron

[daydreamer]

Did you build the stairs starting in the basement to the 1st floor?

Can you post another picture of the first floor with the Reference Display ON?

[ronmckie]

Here is the new picture - w/ref floor on. The stairs start in the basement and are coming up to the 1st. floor.

Ron

[daydreamer]

Ron,

Click on the Vector view camera, then click on the Cross Section/Elevation child tool. From outside of the layout model drag a view in the direction of the wall. When you get the image click on the select arrow and click on the exterior wall. Click the drag handle on the bottom of the wall and attempt to drag the wall down. You will get a warning, but disregard it and pull the wall down until it meet the piece of wall along side of it.

I will stay online, so let me know if you get it.

[ronmckie]

This is what I get. I'm not sure that is what you expected. If I drag down the wall at the top, I get a hole where it was. If I drag the bottom, it just gets deeper.

[daydreamer]

No drag the area that's raised where the stairs are. Not from the top of the wall.

[ronmckie]

I did it both ways. When I lowered the top of the wall, I had a hole exposed. When I lowered the brick, from the outside it looks fine. When I start removing layers (the brick), you can see that the sill is missing for that area.

[daydreamer]

I don't know what you are doing wrong. I can duplicat your problem and perform the edit and everything is ok.

[ronmckie]

I don't know if this view will add any insight as to what is happening, but maybe it will. If not, thanks for trying to help out.

Ron

[daydreamer]

Ron,

Try setting the Open Below room to a floor height of -12

[ronmckie]

OK, we are making progress. That fixed the foundation. Now that just leaves the first floor!

[daydreamer]

What's missing?

[daydreamer]

Ron,

In the real world you wouldn't have a piece of the floor platform on the foundation where the "open below" cuts through the floor. The exterior walls would sit on the foundation as seen in this picture. There wouldn't be any floor joist, or rim joist sitting on top of the foundation under the 1st floor walls. If you want something there just for looks, make a board out of a soffit and put it there.

[Allen42ACJ]

Hi Rick
Your right about the ceiling height.Depends how you build it..

I build that with the deck framed the width of the foundation wall and add for the thickness of a basement wall if it is finished.
That way the outside wall can be built in one piece on the floor..

[ronmckie]

What doesn't make sense to me is the missing rim joist. I would expect the outside wall to be built on it. I don't see how or why the stair well would change that.