Ron, I think this would definitely be a concern if the entire crawlspace was excavated down 3' all at once as opposed to doing sequential pinning. I suppose there is some misunderstanding on my part as to whether the standard approach to underpinning a small residential area (approx. 400 sq...
6' does seem long on a 20' long wall (4 of them, 1 wall only an internal retaining wall against the other half of the non raised basement slab) Especially so because there is only 2 forming sequences.
As to some of the points about the raised portion of the pin that extends inwards, I have only...
First time posting on this site. My apologies if this is the wrong place for this post. I am a residential home designer and I currently have a client who wants to have their 5' deep crawlspace lowered to 8' deep. A specialized foundation contractor has proposed underpinning the foundation...
