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I am sorry I do not. Let me clarify a little more. There is a bump out on the house that extends 6'. Its width is 10' so the bump out is 10x6. It was built with a crawl space foundation however the rest of the house was built with a full basement foundation. I would like to excavate below the bump out without tearing out the bump out.
Under the bump out from end to end so across the 10' width.
The length of the 2x12 are going to be longer than the width of the bump out so the ends will rest on firm concrete or 4x4's. Once I have finished the dig, I will pour concrete walls around the perimeter
I don't know what the span should be. That is why I am asking. It is supporting two floors and the roof of those two floors
What other information do you need to know what will work?
Could you tell me what would work? Nothing has been purchased yet
The information you requested is the length of the shoring beam and the length of the joist, correct? No shoring beams and no joists have been purchased therefore I am asking what sizes would work