Used for temporary support in basements when lifting or aligning structural elements during building, decoration, or repair projects, this adjustable basement floor jack provides a lifting capacity of 5,570 to 8,800 lbs. and is suitable for beams, crawl spaces, porches, decks, stairs, and other heavy load areas. The unit is built from steel with a zinc-coated surface to resist corrosion and endure damp conditions commonly found in lower levels. Height adjustments are made by turning 2 bolts and a screw nut, allowing quick changes and precise positioning, while a cross bolt fixation helps keep the jack steady under load and during repositioning. The base plate measures 4.92 by 4.92 in. and the top plate 4.15 by 4.15 in. resulting in a compact footprint that supports stability on varied floor surfaces. The adjustment range spans 18 to 35 in. enabling alignment over different structural elements and providing a flexible solution for temporary support tasks. The design emphasizes straightforward setup and reliable performance, with simple components that minimize complexity for users who need to position the jack in tight or confined spaces. This tool supports basements through decoration or repair work where temporary elevation and stabilization are required. It remains stable during adjustments and when repositioning across uneven floors.