Our Flat Jacks (also sometimes referred to as Pancake jacks), are used for pre-loading steelwork. Water is used to preload, and then pumped out and filled with grout, which then sets. 

They have a low profile so can be used in the tightest of spaces. So are often used for bearing replacement and lifting and weighing structures with limited access.


8 - 868 tonnes cylinder capacity
Load bearing capacity: 79kN - 3393kN
Stroke limit 25mm

About Flat Jacks

They are light and easy to use and can be used in new construction in which they might form part of the structural concept, in remedial works or for the structural repair or modification of existing structures.

The low profile of the flat jacks make them ideal for lifting, lowering, stressing and pre-tensioning in the tightest of spaces. They can be used as a temporary solution or as part of a permanent design.

All our Flat Jacks are tested, certified and calibrated by our in-house hydraulics experts before every hire. If required, our hydraulics team will also install and operate the jacks for your project.

Available for sale or as part of a design.

Generally used in a variety of applications:

  • Bridge Jacking
  • Building refurbishment
  • Heavy shoring
  • Pre-loading
  • Underpinning
  • Lifting/ lowering and sliding
  • Monitoring and control


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    • Capacity (kN)


      Stroke (mm)


      Closed height (mm)


      Diameter (mm)


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