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Thank you so much for those design/build suggestions. I left messages with all three and I also have someone from Kefficient comming to look at the basement. I am curious, if there is a massive underpinning, such as 4 or 5 feet thick, wouldn't an extension of the underpinning up behind the...

Sorry, I meant to say 36" thick pit/underpinning for room for the worker.https://files.engineering.com/getfile.aspx?folder=97af2df7-3133-4da2-8d16-1ec7e55cac2a&file=Underpinning_Drawing2.docx

I saw your presentation on hand-digging the pits and shoring with wood. That makes a lot of sense and I see how it directs a lot of the strategies you recommend. I have seen you stress this in a lot of posts so I am sure it is the way to go. It would seem a more thick underpinning would help...

Any recommendations for a very experienced underpinning engineer in the Richmond, Va area would be much appreciated.

Thank you again for your reply, I have a couple other engineers comming to discuss the project, but it is difficult to find someone who is very experienced with underpinning. I have read a lot of posts on here and PEinc's experience seems much more expansive than the average engineer and really...

Thanks a lot for the info, I'll do that.

I attached a drawing of the wall and new underpinning. The longest wall is 24 feet long.https://files.engineering.com/getfile.aspx?folder=29bba63a-89c5-45b7-b73a-c0eabde6acba&file=Underpinning_Drawing.docx

The engineer is actually just a friend who gave some advice. He hasn't actually been involved in a basement underpinning before. He is just working off what I mentioned above.

I am working on a 1920, 2-story balloon-framed addition with 9" thick brick foundation that is 30" deep. I want to pour in 60" high underpinning sections for a total wall height of 7'6". There will be 6' of dirt cover outside. The sections will be 3' wide and 20" deep. The sections will also...