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Steve H.
Reviewed in the United States on March 16, 2025
I have a couple porch columns with rotting bases. I am ordering some columns. Once they get here, I will have to swap them out. While doing that, I need a way to safely hold up the porch. This is what I got this jack for.The "normal" use for this jack is as a way to support a floor that is sagging to level it back out. But they work fine as a temporary solution, too.The jack is rated at a max load of just under 10k pounds (9738#) and has a ultimate rating of double that. The base and the top plate have screw holes so you can attach to the surfaces for permanent installation, ensuring no slippage of the unit.Be aware that this is not like a car jack. You control it by spinning the shaft, with the included round bar (or a large screwdriver, etc.) There is only about 4 inches of adjustment range.In the pics, you can see that the top of the jack body is a round metal top, about 3/8" thick. It has a threaded hole in the top that accepts the jack's shaft. The shaft appears to be (I did not have thread gauge large enough to confirm) a M30-3.5 shaft, so about 1-3/16" in diameter. My only concern is that the threads in the jack base seem to be a pretty loose fit to the threaded rod, making it a little wobbly. Another cause for this is that the top where the threaded hole is in only about 9.5mm thick. With a thread pitch of 3.5mm on the shaft, this means there are only 2.7 threads in the top of the jack. For max strength, you would need 1.5 times the shaft's diameter (or 45mm) of thread engagement. Instead, we get 9.5mm. That's only about 20% of the thread required for max strength. Just worried that a really heavy load could tear out the 2.5 threads you get. You'll have to trust the engineer who designed it knew what he was doing. But for me, I will only use for temporary (and less that full-rated) loads.
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