We have a small cabin that we would like to extend 10 feet in the back. It has a crawl space. The architect and engineers have designed a new floor plan for the house that involves putting new footings (Piers) under the back wall, in addition to several other footings to support the extension. It's a pretty big job for such a small cabin. It involves putting a new roof on the entire structure too.
I was wondering, just out of curiosity, how is it possible to put a new deep footing under an existing wall? Digging a hole for a pier seems pretty straightforward with an auger in an open space. But how would it be done underneath the exterior beam of the house? Is it even possible, or would the beam need to be removed in the process? Or is there some way to drill sideways to accommodate the pier?
I really wish the architect could have done it another way. I won't be doing this myself, of course, but I was just wondering what we are asking the builders to do.