My latest geotechnical report recommends the use of a raft/waffle foundation due to expansive soil.
The building will be a 75′ x 100′ metal building on concrete slab.
A raft foundation, as I understand it, is basically a reinforced concrete slab, sometimes with an edge turndown to prevent skidding.
A waffle foundation, I believe, consists of a grid of strip footers that are reinforced and interlock each other.
Therefore, I assume that a raft/waffle foundation is a combination of these two. Am I on the right track?
Anyone here have experience with foundations like this?
Heck If I know….