Dimatt

Thank you all very much. A combination of those worked well. For anyone who tries this, make a new cmu wall type that is about 4" thick(or whatever your local headers measure). Make the foundation wall a pony wall with the 4" wall on top. After the stem walls are in, I had to select them and set pony wall "elevation of lower wall top" to -4" and it looks pretty good.

I need some help getting chief to build my foundation the way it is actually built irl. Standard slab detail here is: Trench footing, 3ish courses of block, the top course being an L shaped "header block". Slab is poured using this header as the form. I cannot seem to get the software to make this detail. Is this just a weird building practice in East Tennessee that isnt supported or am I missing something simple? I have tried setting hang platform inside walls and then move slab to top of wall in foundation dbx but never got anywhere with that. See attached detail for something like we do here. (borrowed and quickly and crudely edited, cmu usually not poured solid as shown) I am not looking for a perfect auto detail or anything, just a 3d view that looks reasonably close.