These jacks can carry a full load of 18,000 pounds when extended no more than 15 inches in height. They can get 3 inches more, but they won't support the full weight. It may be okay to lift a sagging floor, but you need full lifting capacity when there is a wall above your lifting point. The comments about weak ground planes are correct. For example, at full load, the plate in which the screw is inserted will shatter until it touches the raised surface. This can easily be stopped by putting 2 1/2" shims in the recess to support the weight instead of the plate. .When the load compresses the plate, the shims will hit first. If the shims get in a little digging in the beam transfers the load to the rest of the plate.Works well and requires no machining.The fact that the parts are not welded together makes it difficult to fit this jack in tight spaces.I found that I could use the was able to tape things together long enough to keep everything in place. Even with a light load, everything stays in place. Be sure to wipe the bolt and nut and make sure the threads are running smoothly before attempting to use this jack mine had dirt and metal shavings that used to jam the screw make sure the tip of the jack screw is clean and smooth t is I had to remove some burrs and dirt to get a smooth bearing surface. After everything is clean and spinning easily, lubricate the threads and bearing surface. Otherwise it will be very difficult to lift anything close to the rated load. So, a little more care in the work and the right top plate and you'll have a great product. It could be further improved by providing a second set of wedge flats at 90 degrees to the first set. With only one set, in tight spaces you need to use a small pipe wrench to turn the jackscrew.
Hassle-Free Workstation: Aain Heavy-Duty Adjustable Tray With Rolling Wheels In Orange
42 Review
π§ SOLEJAZZ Heavy Duty Retractable Workbench Caster Kit - 880 LBS Capacity, 3" Urethane Wheels, All Steel Construction, includes Bonus Install Template - Pack of 4
9 Review
π§° Portability Enhanced: Worx WX066 Sidekick Work Table
10 Review
ποΈ VIVOHOME 110V 440 Lbs Electric Hoist with Emergency Stop Switch, Garage Ceiling Crane Overhead, Zinc-Plated Steel Wire Winch for Garage, Warehouses, Factories Lifting
9 Review
Ensure Safe Steps With Outdoor Non-Slip Stair Treads - 10 Pack Of 6"X40" Black Anti-Slip Strips
42 Review
Non-Slip Brown Carpet Stair Treads - 15-Pack Of 8"X30" Runners For Wooden Steps
39 Review
Upgrade Your Stair Safety With SUSSEXHOME Polypropylene Carpet Strips - Easy To Install Runner Rugs W/ Double Adhesive Tape - Set Of 7 Decorative Mats In Brown
38 Review
Protective And Stylish: XCEL 4Ft W X 5Ft H Black Steel Fence Gate With Anti-Rust Technology And Sharp End Pickets For Effortless Installation And Durable Outdoor Use
34 Review