Foundation Adjustable House Floor Jack Posts 4-Pack - Heavy Duty

In this review we look at the 4 Pcs Foundation Adjustable House Floor Jack Posts, a practical kit for homeowners and contractors who need adjustable temporary or permanent support. The bottom line: this 4-pack is best for leveling floors, joists, porches and crawl spaces where a compact, high-capacity support is needed. Its strongest selling point is the combination of a useful 4 1/3 to 7 in adjustment range and a heavy galvanized construction that delivers up to 3000 lbs to 5500 lbs per jack for dependable support.

Key Features

• Adjustable Height: The screw jack adjusts from 4 1/3 to 7 in, allowing precise leveling in tight spaces and small drops.
• High Load Capacity: Each jack supports between 3000 lbs and 5500 lbs, providing robust support for floors, beams, and furniture during work.
• Galvanized Construction: The heavy duty galvanized finish resists corrosion for indoor or outdoor use and adds durability for long term secondary support.
• Compact Footprint: The 3.78 in square base and 3.23 in square top plate concentrate load safely while fitting into crawl spaces and narrow areas.
• Secure Installation: Components fit tightly with a positioning nut to reduce lateral movement and make the jack reliable under load.
• Simple Kit: The package includes four adjustable basement support screw jacks so the buyer has what is needed for multi-point support jobs.

Who It's For

These adjustable screw jacks are targeted at DIY homeowners fixing sagging floors, contractors doing short-term shoring, and anyone needing a compact solution in basements, porches, decks or crawl spaces. The combination of a modest adjustment range and high per-jack capacity makes them especially useful where space is limited but heavy loads are present.

Those who regularly require very fine height adjustments beyond the 4 1/3 to 7 in range or who need integrated threaded rods and long-term engineered footing may prefer purpose-built foundation posts or a professional structural solution instead.

Pros & Cons

Pros

• Solid load ratings of 3000 lbs to 5500 lbs per jack for substantial support.
• Galvanized finish improves corrosion resistance for indoor and outdoor use.
• Compact base and top plates fit into tight spaces like crawl areas and under stairs.

Cons

• Adjustment range is limited to 4 1/3 to 7 in, which may not suit larger elevation differences.

Specifications

Adjustment range	4 1/3 to 7 in
Single support capacity	3000 lbs to 5500 lbs
Base plate dimensions	3.78 in x 3.78 in x 0.19 in
Top plate dimensions	3.23 in x 3.23 in x 0.19 in
Finish	Galvanized
Package contents	4 x Adjustable basement support screw jack
Warranty	One-year

Our Verdict

The 4-pack of adjustable foundation floor jack posts is a sensible, budget-friendly option for homeowners and contractors who need reliable temporary or secondary support in confined spaces. With heavy duty galvanized construction and high per-jack capacity, it provides strong value for leveling and shoring tasks, though those needing a wider height range should consider alternative systems.

Frequently Asked Questions

Can these jacks be used outdoors?
Yes. The galvanized treatment provides corrosion resistance suitable for outdoor use, though placement on a stable footing is recommended.

How many jacks are included?
The package includes four adjustable basement support screw jacks, sufficient for multi-point support jobs.

Is installation difficult?
Installation is straightforward; components fit tightly and the positioning nut helps secure the jack, but follow safe shoring practices for load-bearing work.