Yes I agree. No, the walls will not be loaded until after construction, but I don't think there is a way to construct without undermining so I will demo at least 3' of the existing wall and slab to construct.
Thanks for looking at it, I think the only way to build this new retaining basement wall is to demo at least 2' of that existing slab. There doesn't seem to be a way to construct without undermining the existing slab and wall footing.
Here is a section:
I am designing an addition to an existing house. They are only keepint the garage slab, and i am doing everything else new. Directly behind the garage, i have designed a retaining wall for a 6' basement/crawlspace. The more i look at it, the more i thing i need to account for loads from the 'on...