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Slab Foundation Question


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#1 Rusty Lovett

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Posted 30 September 2020 - 01:49 PM

I’m using auto basement for creating foundation walls and slabs as that’s typical for my area; footers, 8” block foundation walls, compacted fill, 4” slab. When I auto basement on a brick exterior/ 3.5 partition, I place my reference point on exterior of sheathing but the foundation walls align with exterior of brick. The common practice around this area is aligning sheathing (or framing) with foundation wall exterior, and then the exterior brick goes to the footer or grade. I may be overlooking a recent thread telling how to correct this. Should I change bearing in wall definition? Thanks for advice on how to correct or advice on settings.

#2 Kevin Rabenaldt

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Posted 30 September 2020 - 02:49 PM

Is your brick defined as bearing in the wall definition?  If so, the uncheck the bearing box.



#3 Rusty Lovett

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Posted 30 September 2020 - 04:03 PM

I checked and only Plate A (3 of them) are shown as bearing and the stud

#4 Jeff Grenz

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Posted 30 September 2020 - 05:14 PM

Also look at "dimensions" and "extensions" check boxes.



#5 Rusty Lovett

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Posted 30 September 2020 - 05:41 PM

In wall definitions?

#6 Jim Johnson

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Posted 30 September 2020 - 05:50 PM

It doesn't sound like you have brick material defined in your basement wall definition.  The transition height can be changed by editing the wall.  Search "transition" in help.



#7 Rusty Lovett

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Posted 01 October 2020 - 09:22 AM

I messed around with it last night and came close to what I wanted to accomplish by using you guys input. So I decided to rough sketch the detail so it would clarify my end game. (See attached image) And I do apologize for my ignorance, I’m new to softplan so I’m trying to learn the features as I go, learn by doing in a sense. I have autocadd experience and some 3D (ProE AutoCadd architecture) but none are built for residential like softplan. My step father was a contractor so I know the construction as well. Just got to nail down the softplan features and logistics.
From what I can tell based on input, I need to add exterior brick to the 8” block definition. Make sure bearing is stud wall and plates. With exterior brick added to the 8” block, should I move the reference point in main floor to exterior brick instead of outside of stud wall or sheathing? Thanks again for the help guys.

#8 Mark Petri

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Posted 01 October 2020 - 09:25 AM

Rusty,

 

No image attached. You need to upload the image, then select "attach this file" for it to show (assuming it isn't too large).


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#9 Rusty Lovett

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Posted 01 October 2020 - 09:50 AM

Sorry about that. Forgot the attach file button.

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#10 Richard Rubinski

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Posted 01 October 2020 - 11:13 AM

You need 2 different wall definitions and 2 different drawings, one for the Foundation and one for the Main Floor. Add each drawing to the model with the foundation on the bottom.

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#11 Rusty Lovett

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Posted 01 October 2020 - 11:50 AM

So instead of drawing the foundation using auto basement just draw two separate drawings and combine. I thought there would be a way to do it using auto basement.

#12 Richard Rubinski

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Posted 01 October 2020 - 12:35 PM

You can if you have a basement. I've haven't used it for a stem wall foundation. I find it easier to using 2 drawings. Then you'll have a foundation plan to submit to the building department if needed, and it's easier for however does the foundation. I have different foundation walls for a slab and a crawl space.



#13 Richard Rubinski

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Posted 01 October 2020 - 12:40 PM

Also use a reference circle in the same place on each of the drawings so they will align in your model.



#14 Richard Rubinski

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Posted 02 October 2020 - 09:17 AM

I’m using auto basement for creating foundation walls and slabs as that’s typical for my area; footers, 8” block foundation walls, compacted fill, 4” slab. When I auto basement on a brick exterior/ 3.5 partition, I place my reference point on exterior of sheathing but the foundation walls align with exterior of brick. The common practice around this area is aligning sheathing (or framing) with foundation wall exterior, and then the exterior brick goes to the footer or grade. I may be overlooking a recent thread telling how to correct this. Should I change bearing in wall definition? Thanks for advice on how to correct or advice on settings.

Does your basement wall have brick as your first material in the block wall definition?  Do you want the sheathing to set on the block? The air space will have to be 1" on your basement wall so it will line up with your brick and stud wall that has a 1" air space. You may have to have the sheathing as a bearing material to get everything to align in the model.



#15 Richard Rubinski

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Posted 02 October 2020 - 09:38 AM

This was done with auto basement. When you make the sheathing a bearing material erase the reference circle and replace it and it will be ½" each way off of the corner or you can move it a ½" each way.

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#16 Rusty Lovett

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Posted 02 October 2020 - 12:28 PM

Yes that’s exactly how I set my reference point. So that the sheathing lines up with face of foundation block. When I auto basement it still lines up foundation block wall with exterior brick. I believe my issue is adding an exterior brick to the 8” block wall definition. I was unable to try last night, but the night before it worked but for some reason the exterior brick I added to the 8” block definition did not line up with the ext brick. But that may have been an issue with the air space or wall beginning measurements that have to be changed in definition. I will give it another whirl tomorrow to see if I can get it. If not I will use the two drawing method, but I was trying to skip steps having to overlay the main floor plan and tracing walls. I just thought that was the purpose of autobasement, to avoid those steps, and still get same finished product I was looking for.

#17 Mark Petri

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Posted 02 October 2020 - 12:38 PM

A lot of the alignment will have to do not only with your reference point, but also the wall definitions and what is counted as bearing vs what isn't. I have not used auto-basement except in an initial look at how it works and suspect it wants to line up bearing materials. I suggest double checking that for the walls you are using to be sure what is bearing is lined up.


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#18 Richard Rubinski

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Posted 02 October 2020 - 01:09 PM

If you make a change to your basement wall in the wall definition delete the basement drawing and add it again or overlay your basement drawing with the main floor drawing to see where it’s off.

#19 Richard Rubinski

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Posted 02 October 2020 - 01:38 PM

Or the Main Floor wall definition. If you changed the sheathing to bearing that would add that thickness all the way around on your basement plan.


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#20 Richard Rubinski

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Posted 02 October 2020 - 01:40 PM

You're correct Mark






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