Adjustable House Floor Jacks 11.8 in - 16 in Range - Temporary Support

In this review of the Adjustable House Floor Jacks, the bottom line is simple: these are practical, heavy-duty telescoping jacks for builders and homeowners who need a reliable temporary support solution. The set of four offers a solid balance of load capacity and adjustability, making them well suited for leveling floor beams, stabilizing joists, and shoring up porches or crawl spaces during repairs. The single biggest reason to buy is their straightforward mechanical design and rugged steel construction, which deliver predictable support where a temporary, adjustable prop is needed.

Key Features

• Range of adjustment: The 11.8 in to 16 in height range covers common gaps between beams and finished subfloor for temporary leveling tasks.
• High capacity: Each jack is rated from about 6,860 lbs up to 9,920 lbs, providing substantial support for joists, small beams, and local loads.
• Heavy-duty construction: Made from painted steel, the jacks resist wear and deliver a sturdy feel under load for construction and maintenance work.
• Threaded safety lock: The M22 screw and safety pins allow secure locking once the desired height is reached, reducing the chance of unintended collapse.
• Simple installation: The telescoping top plate rotates to adjust height and can be locked with a spanner, so no specialized tools are required for setup.

Who It's For

These adjustable floor jacks are aimed at contractors, remodelers, and competent DIYers who need temporary auxiliary support while replacing joists, leveling floors, or stabilizing porch and deck framing. The set format and robust capacity make them a practical choice for short-term holds on residential projects.

Those who need fine incremental adjustment under a permanently loaded condition or who require hydraulic lifting for vehicle service should look elsewhere; the jacks are intended for temporary, manual adjustment and secure holding rather than continuous repositioning under heavy live load.

Pros & Cons

Pros

• Sturdy steel build gives a sense of durability and reliable support during construction tasks.
• Generous load capacity per jack makes them suitable for common residential shoring needs.
• Easy to install and lock in place using the M22 threaded adjustment and a simple spanner.

Cons

• Adjustment can be difficult or impossible under heavy load, so jacks must be set or relieved before fine tuning.
• Limited vertical travel to 11.8 in-16 in means they are not suitable for large elevation differences.

Specifications

Range of adjustment	11.8 in - 16 in
Height capacity (each)	9,920 lbs to 6,860 lbs (approx 3 - 4.5 ton)
Base plate dimension	5 in x 5 in x 0.19 in
Top plate dimension	4 in x 4 in x 0.27 in
Thread type	M22
Finish	Painted steel

Our Verdict

These adjustable house floor jacks are a sensible, value-oriented choice for anyone needing temporary support during repairs or construction. Their heavy-duty steel construction, clear height range, and strong per-unit capacity make them good for stabilizing joists, porches, and crawl spaces, provided users set them without attempting fine adjustment under full load. For straightforward shoring and leveling jobs they offer dependable performance at a fair price.

Frequently Asked Questions

Can these jacks be adjusted while holding a load?
They are designed to be rotated into place and then locked; customers report limited or no ability to fine adjust the threaded top while the jack is heavily loaded, so relieve load before major adjustment.

Are they suitable for outdoor use on porches or decks?
The painted steel finish offers basic resistance to corrosion for typical construction use, but long term outdoor exposure benefits from additional protection or storage when not in use.

How do you lock the height once adjusted?
Rotate the top plate to the desired height and use a spanner to tighten the nut and engage the M22 safety screw and pins to secure the position.