I have a second floor dormer/room that had dropped a few inches on one end (before I bought the property) due to a poor support design. I now have it supported from underneath and I want to try jacking it up a little at a time using a 20-ton bottle jack on each of the two exterior corners. It actually needs to go up about 4 inches in order for the dormer/room floor to become level again. I don't know if that will be possible, but I want to try jacking it up a little at a time and see if that will be feasible. I expect cracks etc., but I am redoing the house so that is not an issue or problem.
My question is, what can I put on top of the bottle jacks to spread the load out over a larger surface area. I assume I can look for and buy a couple of small steel plates to put on top of each bottle jack, but I am not sure. Or, is there something that is made for this that is available?
Thanks.
P.S.