floor jack rating
I have an old dutch colonial, built in 1909. Doing a ceramic tile job in the kitchen. Between the kitchen and the rooms to the east of it is a double floor joist. I do NOT want to try to level the floor with a jack but just support it, as the (big) refrigerator sits on the east wall of the kitchen, and on the other side of that wall is a toilet. That side of the floor leans a decent amount and my tile installers are going to do some leveling. I just want to put a floor jack under the joist to keep it from sagging any more years from now. Is there a certain lb# rating I need to buy? Basement has old concrete floor, but concrete would not be deep to support weight if I were to choose to start upping the jack(which I'm not). Should I get a piece of steel to put under the jack?