Basement Floor Jack 19-36 Adjustable Support Beam Jack - 5 Pack

In this review of the BISupply Basement Floor Jack 5 pack, the bottom line is straightforward: this kit is for homeowners and contractors who need a temporary, heavy-duty solution to lift and stabilize sagging floors, joists, or beams while repairs are made. The single biggest reason to buy is the combination of high load capacity and wide height range, letting one product handle lifts from 19 to 36 in for many common repair tasks. The review focuses on real-world utility, build quality, and practical installation points observed by users.

Key Features

• Adjustable Height: The screw jack post adjusts from 19 to 36 in, giving flexibility to lift ceilings, floors, or beams during repair without swapping models.
• High Capacity: Each jack supports up to 9,700 lb at its minimum height and still handles up to 6,800 lb at full extension, so it can bear substantial temporary loads.
• Durable Construction: Made from oxide finished steel and ISO9001 certified, the posts provide a corrosion-resistant, reliable surface for repeated use on job sites.
• Stable Base and Plates: A 3 in diameter base post with welded-on floor plate and a large roof plate help distribute load and improve stability on concrete slabs when secured.
• Complete Hardware: The package includes turning bars and four locking pins per post to keep the screw mechanism locked while work proceeds.
• Pack of Five: Sold as a 5 pack so multiple points of support can be installed to stabilize larger spans or several sagging joists at once.

Who It's For

The BISupply Basement Floor Jacks are best for DIYers, contractors, and repair crews tackling temporary levelling of sagging floors, cellar ceilings, crawlspaces, and roof trusses. They suit jobs where a removable, adjustable support is needed during beam replacement or joist repair and where a high temporary load capacity matters.

These jacks are not intended as permanent structural supports, so anyone seeking a long-term foundation solution should consult a structural engineer and look for permanent repair methods. Also, if the work requires finer micro-adjustments under light loads, a lighter-duty jack or shimming approach might be more appropriate.

Pros & Cons

Pros

• Solid build quality and finish make the jacks feel durable and suitable for repeated temporary use.
• Wide height range and high weight capacity cover many common levelling and support tasks.
• The 5 pack format provides good value when multiple supports are needed for a single repair job.

Cons

• Some customers reported mixed experiences with installation, and one common limitation is the need to secure the base plate to concrete before applying load.
• Not intended as a permanent structural solution, so further work will be required to make repairs permanent.

Specifications

Brand	BISupply
Height Range	19-36 in
Max Capacity per Jack	9,700 lb at 19 in; 6,800 lb at 36 in
Material / Finish	Oxide finished steel, ISO9001 certified
Base Post Diameter	3 in
Pack Quantity	5

Our Verdict

The BISupply Basement Floor Jack 5 pack is a practical, cost-effective temporary support system for anyone repairing sagging floors or joists. Its strong build, wide adjustment range, and high load capacity make it a solid choice for temporary levelling and stabilization work, though it should be paired with permanent repairs and proper anchoring to concrete.

Frequently Asked Questions

Can these jacks be used permanently?
They are designed for temporary support during repairs and are not a substitute for permanent structural fixes.

Do I need to secure the base plate to concrete?
Yes; for best stability and load transfer, secure the welded-on floor plate to the concrete slab before applying full load.

How many posts should I use for a sagging floor?
Use multiple posts spaced under affected joists; the 5 pack lets you install several supports at once for broader stabilization.