New answers tagged demolition
That is really sketchy. Built-up 2x4s aren't great for carry loads - something like a 4x4 is much much better. If you want to replace it, a temporary support on each side, take out the wall, dig out a section of the floor, and then pour a footing underneath, let it cure, then put in a replacement post. Steel is a lot more common for this usage than wood.
Hmm, this definitely looks structural. Any time you see 2 or 3 2x4's nailed together like that it is usually for some kind of header. The other issue I see is that it looks like regular 2x4's and not pressure treated. Anytime you have bare wood sitting on the subfloor, it should be PT. I would definitely put in some supports before you do any cutting to the ...
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