Ellis Mfg. Co. 4x4 Screw Jack - Steel Adjustable Support - Safe Load Capacity (15,000 lbs) - Painted Finish
Key item features
- EASY TO USE: Designed to provide either vertical or horizontal support, this adjustable screw jack is functional, strong, and heavy duty. To adjust the height of the screw jack, simply turn the "U" shaped handle until you reach your desired height. Lock the Safety Screw in to set the height for long term support applications.
- SAFE & SECURE: Built with high quality steel, this Slip-On Guardrail Bracket can be correctly installed by nailing the Guardrail Bracket in position so the intended force is pushing in an opposition direction of the steel bar stop attached to the purlin or joist.
- TRUST IN ELLIS: Ellis Manufacturing Company has been a leading manufacturer of construction materials since 1951. Our primary focus has always been on shoring equipment for commercial and residential construction. Ellis is dedicated to providing unbeatable quality, affordability, and customer service.
Specs
- Max load15000 lb
- Maximum lift6 in
- Lifting jack typeScrew Jacks
- FeaturesAdjustable
- Brandunknown
- MaterialStainless Steel
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About this item
Product details
The Ellis 4x4 Screw Jack is a highly adaptable tool for constructing adjustable structural supports using standard 4x4 lumber. Suitable for both permanent and temporary use, it can be employed in residential, commercial, and emergency shoring scenarios with ease.
Specifications:The Ellis 4x4 Screw Jack is constructed from high carbon steel and designed for long-lasting durability. Every Ellis product undergoes rigorous load testing to accurately determine SAFE load ratings. You can trust that all load capacities listed on the Ellis Manufacturing Co. website maintain a safety factor of 2.5 to 1 or higher.
Demonstration Video- 15,000 Lb. Safe Load Capacity!
- For Vertical / Horizontal Support in residential, commercial, trench shoring and collapse rescue applications.
- Galvanized or Powder Coated Finish.
- Use your own Standard with Dressed 4x4 Lumber (3.5" Sq.), cut square to any length.
- 14.25" Minimum Overall Height (screwed down).
- Full 6" Adjustment with 1.25" dia. acme threaded screw.
- Turn "U" Shaped Handle to Adjust Height of Screw Jack. Lift up to 1800 lbs by hand or 4000 lbs. w/ a 2"x4"x6' piece of lumber placed between screw and handle for extra leverage.
- Screw is Greased for easy tuning and to prevent rusting.
- Base Plate will not turn with screw and 4 5/16” Diam. holes are provided to secure it to a solid foundation. Always Secure to a solid foundation.
- Proper bracing required Prevent lateral shifting.
- Screw Jack is equipped with a safety lock. Tighten safety lock with an Allen Wrench once final adjustment has been made to prevent accidental height adjustment to jack post. (use 6mm allen wrench)
- 4x4 Heads are available for securing vertical 4x4 to horizontal beam: Purlin Splicer, Joist Holders, Pivoting, T-Head, U-Head.
| Total shore height including SJ-4 | Maximum safe load capacity |
| 4' | 15,000 lbs. |
| 6' | 12,000 lbs. |
| 8' | 7,200 lbs. |
| 10' | 5,000 lbs. |
| 12' | 3,000 lbs |
| 14' | 2,600 lbs. |
| 15' | 0 lbs. |
Load capacity based on actual load test results Douglas Fir #1 4x4 dressed lumber (3.5" square). Capacities include a standard 2.5/1 safety factor. Lumber must be cut square on both ends. Do not exceed recommended allowable safe load ratings in the above chart. Do not extend screw past advertised adjustment range.
*Caution, the acme screw of the 4x4 GALVANIZED Screw Jack will completely separate from the acme nut if screwed out too far. Do not extend the acme screw past the maximum adjustment of 6". This will insure that the threads of the acme nut will be used to support a heavy load. For maximum safe load capacity to be obtained, Ellis Screw Jack should be used with a 4x4 lumber cut to at least 5.5" long and subject to support straight loads only. We recommend tightening set screw in the side of the Screw Jack with a 6mm allen wrench prior to loading. Before construction begins it is recommended that you consult with certified structural engineer for approval of our products within your application.
SJ-4
- EASY TO USE: Designed to provide either vertical or horizontal support, this adjustable screw jack is functional, strong, and heavy duty. To adjust the height of the screw jack, simply turn the "U" shaped handle until you reach your desired height. Lock the Safety Screw in to set the height for long term support applications.
- SAFE & SECURE: Built with high quality steel, this Slip-On Guardrail Bracket can be correctly installed by nailing the Guardrail Bracket in position so the intended force is pushing in an opposition direction of the steel bar stop attached to the purlin or joist.
- TRUST IN ELLIS: Ellis Manufacturing Company has been a leading manufacturer of construction materials since 1951. Our primary focus has always been on shoring equipment for commercial and residential construction. Ellis is dedicated to providing unbeatable quality, affordability, and customer service.
Specifications
Max load
Maximum lift
Lifting jack type
Features
Warranty
Warranty information
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Customer ratings & reviews
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Showing 1-3 of 57 reviews
Home projects
Screw jack and joist holder made my job of replacing support posts on my deck a breeze. It also took the worry out of having an accident. Great item, I’ll be able to use this in all kind of projects because of the ability to use different size support posts.
Quality Jack Heavy Gauge Steel
Much better quality compared to what the big box stores had to offer. 1/4 inch thick base and handle, large greased screw. Well worth the cost, purchased four. Used in a crawl space to level a sagging floor. Fast shipping! Very happy that I found Ellis!
It does what they say it does
After looking at several different brands, I chose this one because it looked sturdy and I could cut an existing 4x4 at the rotted base and then use it to temporarily jack one end of the beam using the existing portion of the post that was still in good shape. I was surprised at the ease of turning the screw at the base. I bought two of these so I could install a second temporary post next to the one that was rotten, and then remove the now-shortened post on the other post. This method allows me to "walk" the beam supports along the length of the beam until I replace all the rotten posts. I couldn't be happier with my selection of this screw jack.
