How big is the building?
Just like this![]()
but seriously, brace it so the sides can't move in or out, jack one side a bit then the other then back and so on, cribbing up everything as you go. If you can, get some long enough I beams, tofrom one side to the other.
How big is it? If it's not too big I would think 4 jacks would do it.
