3.5"x3.5" U-Shaped House Jacks, Screw Jack Post for 4x2 4x4 4x6 Joists

3.5"x3.5" U-Shaped House Jacks

• Universal U‑Head Fits 4x2, 4x4 & 4x6 Beams – The generously sized U‑shaped cradle automatically centers the beam without slipping or shimming. Whether you are leveling a sagging floor joist in a basement, supporting a deck beam, or reinforcing a porch, this jack delivers a snug, secure fit every time.
• Smooth 13–17 Inch Micro‑Adjustment – Fine‑tune height with precision using the coarse‑thread screw mechanism. Unlike pin‑lock jacks limited to fixed positions, you can dial in exact lift increments – from 1/8 inch to several inches – for perfect floor leveling, foundation repair, or temporary shoring in low‑clearance areas.
• Heavy‑Duty Steel Construction – 6,000 Lbs Capacity – Built from reinforced high‑gauge steel with a rust‑resistant coating. Each unit is load‑tested to support up to 6,000 pounds (3 tons), making it reliable for residential sagging joist repair, crawlspace leveling, and concrete beam stabilization. The welded telescoping tube eliminates weak connection points.
• Versatile for Crawlspace, Basement, Deck & Garage – Use it as a temporary floor jack during foundation leveling, as a short telepost for basement support columns, or as a beam prop for deck renovation. Compact when retracted (fits tight crawlspaces) and easy to carry. Always install on solid bearing surfaces and consult local codes – for temporary or supplemental reinforcement only.
• Effortless One-Person Installation – No need to call a contractor. Simply position the 3.5"x3.5" U-shaped head under your 4x4, 4x6, or 4x2 joist, turn the threaded screw to extend the jack from 13 to 17 inches, and tighten the locking mechanism. The telescoping design and large base plate provide stable support even on uneven crawlspace dirt or concrete.