Ellis Manufacturing Company - Timber Jack - 5" Adjustment Range - 15,000 lbs Safe Load Capacity

I used two of these to lift a sunroom 2.5". I recommend using 5/16" x 1-1/4" lag screws to attached to post or making the holes in the screw jack plate slightly larger and using 3/8" x 1-1/2" lag screws. There's a bit of tension on these lag screws when you're turning the U shaped handle to lift the supported weight. Great affordable solution that give an effective range of vertical adjustment.

Inexpensive and space efficient. Bought many of these to create auxiliary beams in my crawlspace to provide more support. If you want a heavy-duty, industrial-strength jack at a good price, here it is. Don’t consider cheaper jacks at the “big box” stores if you want peace of mind. These are similar to the SJ-4 jack, except you must drill a hole in the middle of the 4x4. So, a little more effort but these can squeeze into tighter spaces and they’re less bulky. Great value.