The Tiger Brand Jack Post Super "S" 4 ft. 7 in. Jack Post can adjust from 2 ft. 10 in. to 4 ft. 7 in. It has a compression load range of 18,000 lbs. at its lowest setting and 14,000 lbs. at its highest setting. It is ideal for correcting sagging floors and basement beams and providing secondary support for room additions, remodeling projects, porches and decks.