I am working on a historical home in Savannah Georgia and am trying to locate the proper hydraulic jacks I would need to raise and level the home about 3″ or so.This house sits on peir footings at the present time and I have to raise the struture in certain areas and replace rotted wood and piers.
A typical 12 ton hydraulic bottle jack should have no trouble lifting the house. It will take time and I would suggest no more than 1/2″ per lift. provide a good base One 2×10 set perpendicular and centered on to two 2x10s set perpendicular to two more 2×10 all about 18 inches long will do for almost all soil conditions. smaller even down to a single 6×6 18 inches long for firm dry soils. be sure to use a block of wood or a steel plate between the top of the jack and the wood member you are raising.
unless the home is brick you may have to lift at the perimeter with several jacks at a time and use Masonite shims of 3/32″ inches lifts at a time working your way around the perimeter evenly till you get the 1/2″ then do the interior floor supports, return to the perimeter and repeat until the desired height has been met.