[Lift Your Foundation]: Whether age or disaster led to your sagging floors, lift them with the BISupply Basement Floor Jacks for temporary leveling support during construction renovations and repairs[Strong Enough]: Prior to extending, secure base plate to your concrete floor slab; Weight capacity per jack up to 9,700lb (4,400kg) at 19in minimum height of and 6,800lb (3,084kg) at 36in maximum height[Adjust to Your Needs]: Our basement support columns screw jack post adjusts from 19-36in (48.3-91.4cm) tall using turning bar and screw bolt for temporary bracing[Trusted Quality]: ISO9001 certified oxide finished steel ceiling jack post; 3in (7.62cm) diameter base post with welded-on floor plate and screw jack post; Turning bar with a large roof plate and 4 locking pins[Home and Industrial Applications]: Not intended as permanent supports; Home leveling adjustable column jacks temporarily secures weak floors, crawl spaces, stairs, roof trusses Product Description SUPPORT CAPACITY Each of these floor leveling jacks can support up to 9,700 pounds at their minimum height of 19 inches and up to 6,800 pounds at their maximum height of 36 inches. FOR YOUR PROJECTS Pick up the slack by fortifying your home structures with the BISupply Crawl Space and House Jacks Adjustable Support Posts. ULTIMATE SUPPORT Old houses and natural disasters often lead to cracked floor joists, rotting support beams, and sagging porches or decks.