Got it, thank you, I hate to get too cute with this but what if I were to insulate the interior edge of the foundation wall and footing (i.e. shallow frost protect the interior and only extend it 12"-16" below grade)?
I have a project on a sloping lot where the rear foundation wall is about 6' higher than the front wall due to a sloping site. The ground level space is an unheated garage and the foundation guy is suggesting that the bottom of footing needs to be 4' below the INTERIOR/SLAB elevation which would...
Thank you emmgjld, I think the inspectors concern is just satisfying the requirement for 12” of soil cover.
The lot is raised up about 1’ higher than the surrounding soil so it’s almost like the slab on grade is on a perch. With 18” of compacted stone I can’t imagine water accumulating and...
IRC R403.4.1 specifically states that crushed stone may be used as a FOOTING, not just a sub grade. I found the same reference in regards to wood foundation walls. I’m wondering why they would allow a crushed stone footing for precast walls but not poured walls.
I am a structural engineer in Boston and I have a client who didn't follow my Shallow Frost Protected Foundation Wall detail closely and now only has about 6" along the perimeter to embed the downturned slab at the perimeter. They did, however, add approx 18" of compacted crushed stone which is...
