TSarantopulos Posted February 4, 2019 Share Posted February 4, 2019 Not sure why this is difficult to do. Should be pretty simple. A simple foundation of CMU walls at the default ht set in the program is fine (The footings must be a minimum 18" BG). Its the slab on grade I'm not getting the result I want which is the slab is inside the foundation walls, poured flush with TOF. CA is drawing the foundation 12" above the floor. This is a typical way of slab on grade floors, so why isn't it an option? How can I easily achieve a slab on grade floor that is flush with TOF? SSA was no help at all. Link to comment Share on other sites More sharing options...
DavidJames Posted February 4, 2019 Share Posted February 4, 2019 When you're building your foundation, are you selecting "Slab at Top of Stem Wall"? Link to comment Share on other sites More sharing options...
TSarantopulos Posted February 4, 2019 Author Share Posted February 4, 2019 Wow, that was a fast reply! Thanks! Yes. I've tried both ways checked and unchecked. I'm trying now to go into the defaults and set them first in case its overriding. Link to comment Share on other sites More sharing options...
DavidJames Posted February 4, 2019 Share Posted February 4, 2019 No problem. Are you able to attach your plan file so I can take a look? It'll be much easier to help you Link to comment Share on other sites More sharing options...
TSarantopulos Posted February 4, 2019 Author Share Posted February 4, 2019 Trying something else first and if it doesn't work, I will do. I'm working with someone else's file that is a contract draftsman that I had draw up an as-built. Link to comment Share on other sites More sharing options...
javatom Posted February 4, 2019 Share Posted February 4, 2019 If you have already built the foundation and you are trying to adjust it, you can still accomplish what you are looking for. Set the floor level of the garage and the stem wall top to the same level. See attached pic. Link to comment Share on other sites More sharing options...
TSarantopulos Posted February 4, 2019 Author Share Posted February 4, 2019 OK that didn't work either. I went in and adjusted the default setting/floors and rooms/current floor and indicated that the floor is supplied by Foundation Room Below. Then also indicated the Floor to SWT (what is SWT?) is set to 0. Also that the floor structure is 4" concrete with the 5/8" floor finish. The result is the foundation walls are rendering at 12" above the floor, which isn't right. The attached file, its in its virgin state before any adjustments for anyone that wants to troubleshoot this one. Lane ResidenceASBUILT.plan The file was done out of office by another draftsman. Link to comment Share on other sites More sharing options...
javatom Posted February 4, 2019 Share Posted February 4, 2019 Set your floor to SWT (stem wall top) to zero. Link to comment Share on other sites More sharing options...
TSarantopulos Posted February 4, 2019 Author Share Posted February 4, 2019 It appears by specifying the slab at TOF is what is putting the foundation 12" above the floor. I'f I leave it unchecked it renders below the floor. Which is better but still not correct because the slab is rendering on top of the foundation. Link to comment Share on other sites More sharing options...
DavidJames Posted February 4, 2019 Share Posted February 4, 2019 Build your foundation w/ the slab at top option. Then in the foundation level, at the top click on Edit > Default Settings > Floors and Rooms > Current Floor and then click Edit. In the new window that pops up, third option from the top, change the value of "Floor (C):" to "0". It's currently set at -12 5/8" Link to comment Share on other sites More sharing options...
TSarantopulos Posted February 4, 2019 Author Share Posted February 4, 2019 Wow! That did work! I love CA, but sometimes I'm pulling my hair out over the way it will do things you don't want it to do. Thank you, David! Now I just have to go back and adjust the ceiling heights again since the program has now taken 12" out of the ceiling height? (Why, oh why, do you do the things you do CA? You frustrate me sometimes) Link to comment Share on other sites More sharing options...
KacyRSC Posted Tuesday at 06:17 PM Share Posted Tuesday at 06:17 PM Resurrecting a pretty dead post, but garage slabs and slab-on-grade designs have been a major pain point for me as well. I just don't find it as intuitive as the rest of Chief. I came to post an alternative, if you are building say, a shed or ADU, after you've designed the main houses' entire subfloor and foundation. You dont want to rebuild that foundation, just the one youre working on. Method is: -Draw your first-floor walls for the shed/adu -set desired floor and ceiling heights -set room type to slab or garage -toggle off "floor under this room" -go to the basement floor -go to either "Slab Tool", or "Build>Slab" dropdown menu and select the desired slab type -draw and edit the slab underneath the 1st floor space with reference layer on -set desired floor height, footing dimensions, etc. -For first floor exterior wall types, toggle on "Pony" walls -Adjust pony walls as necessary to say, add an 8" stem wall above grade -Presto! Again, I use this method if a client adds on an ADU or shed, or if I'm working on a plan in sections, and can't rebuild the entire foundation. Hope this helps anyone else struggling with this situation! Link to comment Share on other sites More sharing options...
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