Basement Floor Jack 19-36 Adjustable Support Beam Jack - Stable Lift

In this review the BISupply Basement Floor Jack is examined for homeowners and contractors who need a temporary, strong support solution for sagging floors and cellar ceilings. The bottom line: it is most valuable as a temporary leveling and bracing tool because it combines a high weight capacity with a broad 19 to 36 in adjustment range, making it suitable for many repair and renovation tasks where a reliable, adjustable screw jack is required.

Key Features

• Adjustable Range: The 19-36 in screw adjustment allows precise temporary support during floor leveling or joist shimming without improvising with blocks.
• High Capacity: Rated up to 9,700 lb at the minimum height and 6,800 lb at full extension, it provides substantial lifting capacity for many residential stabilization jobs.
• Durable Construction: ISO9001 certified oxide finished steel with a welded floor plate delivers a robust feel and resistance to wear on site.
• Easy Operation: The included turning bar and screw bolt let users make controlled adjustments, useful when bringing a bouncy floor back to level.
• Secure Contact Points: Large roof plate and 4 locking pins improve stability where the post meets the joist or beam during temporary support.

Who It's For

This jack is intended for homeowners, DIYers and small contractors who need a temporary, mechanical support for sagging floors, crawl spaces, cellar ceilings or roof trusses during repairs or renovations. It suits projects where a screw-style post is preferred for controlled, incremental lifting and where a non-permanent solution is acceptable.

It is not a substitute for permanent structural repair or for use as a long-term foundation support; professional structural recommendations and permanent solutions should be pursued if long-term shoring is required.

Pros & Cons

Pros

• Strong load ratings allow the jack to handle heavy localized loads during leveling tasks.
• Adjustable 19-36 in range gives flexibility for different ceiling heights and joist clearances.
• Solid steel construction and welded floor plate create a stable temporary support that users describe as sturdy.
• Turning bar and locking pin system make fine adjustments straightforward and repeatable.

Cons

• Designed only for temporary use; not suitable as a permanent support solution.
• Some users report mixed installation experiences and may need to secure the base plate to concrete prior to extending for full capacity.

Specifications

Product type	Adjustable screw jack post
Height range	19 in to 36 in
Max capacity	9,700 lb at 19 in / 6,800 lb at 36 in
Base diameter	3 in
Finish	Oxide finished steel (ISO9001)
Includes	Turning bar, large roof plate, 4 locking pins

Our Verdict

The BISupply Basement Floor Jack is a practical, cost-effective temporary support for anyone tackling sagging floors or needing short-term bracing during repairs. It pairs heavy-duty capacity with a useful 19-36 in adjustment range and solid construction, making it good value for short-term stabilization and leveling tasks when permanent repair is planned or a professional follow-up is anticipated.

Frequently Asked Questions

Is this product intended as a permanent support?
Answer. No, the jack is designed for temporary bracing and leveling during repairs and renovations, not as a permanent structural support.

How much weight can one jack hold?
Answer. The jack is rated up to 9,700 lb at the 19 in minimum height and about 6,800 lb at the full 36 in extension.

Does the base need to be secured before lifting?
Answer. Yes, for full capacity the base plate should be secured to a concrete floor slab prior to extending the post.