House has been in my family for decades and I’m trying to save it. It has 3 floors (basement, 1st, and 2nd floor. Also an attic).

I looked in the basement and there are several areas where a beam or board has settled or sagged. Mostly in the center of the house, but I didn’t look at every single part of the basement.

One beam in particular that runs under a bathroom worries me. I figure I need 2 jacks to raise each side of where this board and then prop it up with one of those metal poles (whatever they are called).

Can I just get a bunch of 6 ton jacks. Or is that not safe? Do I need heavier duty jacks? I assume bottle style jacks work fine.

Is there anything else I should be considering?