10 Best Adjustable Jack Posts 2025 in the United States

The ASTAMOTOR adjustable house floor jacks are designed to offer reliable support for various construction and renovation needs. With a notable load capacity of 8 tons (or 4400 lbs per jack), these posts are well-suited for leveling floors in areas such as basements, crawlspaces, and even for supporting cabinets and walls. Their adjustable height range of 19.49" to 34.45" makes them versatile enough for different applications, accommodating various structural requirements.

One of the standout features is the quality of materials used; constructed from galvanized steel, these jacks resist corrosion, ensuring durability and strength over time. The double carriage locks included enhance security during use, which is a significant advantage for safety-conscious users. Additionally, the installation process is straightforward, allowing users to set them up quickly with the provided screws and nuts.

There are a few drawbacks to consider. While the jacks can support substantial weight, some may find the 4.92" base plate size slightly limiting in terms of stability on uneven surfaces. The jacks weigh nearly 27 pounds each, which could be cumbersome for some, particularly in scenarios where frequent adjustments are required. Furthermore, while the warranty offers peace of mind, potential buyers might seek more extended coverage, especially for heavy-duty applications.

For anyone involved in home renovations or construction work, particularly in need of temporary support for sagging floors or structural leveling, these adjustable jacks from ASTAMOTOR present a solid option. Their high load capacity and easy adjustability make them particularly useful for DIY enthusiasts and professional contractors alike, but users should keep the base size and weight in mind when making a purchase decision.

The Ellis Manufacturing 6x6 Screw Jack is a heavy-duty adjustable jack post designed to provide robust support for structural repairs and construction projects. With a safe load capacity of up to 30,000 lbs, it is well-suited for demanding applications like stabilizing support beams, leveling damaged foundations, and shoring up crawl spaces. The 6-inch adjustment range allows for versatile use, and it can easily attach to 6x6 nominal lumber, making it a flexible option for various scenarios.

This screw jack is made from high carbon steel, which ensures durability and long-term stability, even in harsh environments. The corrosion-resistant painted finish further enhances its longevity, and a built-in safety lock provides additional security during use. Weighing 22 lbs, the jack includes a 1.75-inch diameter Acme threaded screw and independent swivel base plates with 4-3/8

The ELLIS Adjustable Light Duty Steel Shores and Jack Post is well-suited for both residential and commercial construction projects, offering a good balance between functionality and ease of use. With a substantial load capacity of 8,000 pounds, it provides reliable support for temporary or permanent applications.

The adjustable range of 61 to 85 inches allows for flexibility in various settings, making it versatile for different heights and spaces. The material used is durable steel, ensuring longevity and robust support for sagging floors, foundations, crawl spaces, and beams.

Its ease of adjustment is a notable feature, with a wing nut that can be turned to achieve the desired height and a set screw to lock it in place securely, although some users might find the need for an Allen wrench a minor inconvenience.