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Flat Jack Equipment & Systems

⚖️ Capacity Range:
1–1,240 tons
↕️ Lifting Height:
1 in
⬇️ Minimum Height:
1.2 in
⚙️ Flat Jack Types:
Round - Square
MAUFACTURED BY | Custom Rentals

Flat jack equipment provides a low-profile solution for specialist hydraulic lifting, structural adjustment, load transfer and controlled support applications. The available range includes hydraulic flat jacks, flat jack pumps and tools, injection cylinder systems, and grout-filled flat jacks for permanent structural applications. Depending on the equipment and project requirements, hydraulic flat jacks and associated equipment may be available for rental, while grout-filled flat jacks are supplied for purchase. Custom Rentals can help you identify the equipment required for your application.

The products displayed are representative models from our rental inventory. Additional capacities, specifications, and equipment configurations are available to meet your project requirements.
If you do not see the exact model you require, contact our team for assistance on 866-522-5464

🔧 Hydraulic Flat Jacks

Hydraulic flat jacks are compact lifting devices designed for applications where installation space is restricted and conventional hydraulic cylinders may not fit. Their low-profile construction allows them to be positioned in narrow gaps between structural components, foundations, bearings and other load-bearing surfaces.

When connected to a compatible hydraulic power source, a flat jack generates lifting force over its effective working area. This makes it suitable for carefully controlled lifting, adjustment, preloading and load-transfer operations where access and available installation height are important considerations.

Hydraulic flat jacks are used in a variety of specialist engineering applications, including:

  • Structural lifting and adjustment.
  • Bridge bearing and structural support work.
  • Underpinning and foundation work.
  • Preloading structural steelwork.
  • Controlled load transfer and structural alterations.
  • Applications requiring lifting equipment in restricted spaces.

Flat jacks are available in different shapes, capacities and dimensions. Round and rectangular configurations are available, with selection depending on the required load, installation space and intended application.

Hydraulic flat jacks can be rented where suitable rental equipment is available. The required jack must be matched to the application and the compatible operating equipment.


⚙️ Flat Jack Pumps, Tools & Accessories

A flat jack is only one part of a working system. The pump, connections, hoses and other associated equipment must be suitable for the jack and the demands of the job.

The equipment required depends on whether the application involves hydraulic lifting, controlled adjustment, load transfer or a specialist injection operation.

Depending on the system, the supporting equipment may include:

  • Hydraulic pumps: Provide the hydraulic pressure required to operate compatible flat jacks.
  • Hoses and connections: Connect the jack to the appropriate power source or operating equipment.
  • Operating controls: Allow the operator to manage the system in accordance with the equipment’s operating requirements.
  • Specialist tools and accessories: Support installation, connection and operation where required.

Not every pump or accessory is suitable for every flat jack. Capacity, operating pressure, connection type, required movement and the intended working procedure must be considered before equipment is selected.

Custom Rentals can help identify the flat jack equipment required for the application and determine which components may be available for rental or purchase.


💧 Injection Cylinder Systems

Injection cylinder systems are used in specialist flat jack applications where controlled injection is required. They are particularly relevant to certain permanent structural installations and other applications involving the introduction of a suitable fluid or filling material into the flat jack.

The required injection arrangement depends on the application. Temporary hydraulic operation, permanent grout-filled installations and transfusion systems are different approaches and should not be treated as interchangeable.

A suitable system must be selected according to the flat jack design, the intended installation method, the material being injected and the required operating procedure.

Injection cylinder systems are available for rental or purchase, subject to the equipment required for the project.

Before selecting an injection system, establish:

  • The type and specification of flat jack being used.
  • Whether the application is temporary, permanent or a transfusion arrangement.
  • The intended injection material and operating method.
  • The required connections and supporting equipment.
  • The load and installation requirements.

For specialist injection and grouting operations, the manufacturer’s instructions and an appropriate engineering procedure should determine the installation and operating method.


🏗️ Grout-Filled Flat Jacks for Permanent Applications

Grout-filled flat jacks are used in applications where a permanent force or load is required to be transferred to a structure. Once installed and filled using the specified method, the unit can form part of the permanent structural arrangement.

These applications may include:

  • Preloading structural steelwork.
  • Structural alterations.
  • Underpinning operations.
  • Pre-stressing applications.
  • Bridge bearing preloading.
  • Other engineered installations requiring permanent load transfer or support.

The filling material and installation procedure must be appropriate for the specific unit and application. Depending on the system, the manufacturer may specify cementitious grout or another suitable material.

It is important to distinguish grout-filled flat jacks from conventional temporary hydraulic flat jacks. Temporary units are generally used for a defined lifting or adjustment operation and are removed when the work is complete. Permanent grout-filled applications have a different purpose and installation procedure.

Grout-filled flat jacks are supplied for purchase, not rental. The associated injection cylinder system may be rented or purchased, depending on the project’s requirements.

Because permanent installations can have significant structural consequences, the correct unit, filling method and installation procedure must be established before work begins.

🔄 Temporary, Permanent & Transfusion Applications

Flat jack systems can be configured for different engineering purposes. Understanding the intended application is essential when selecting the correct equipment.

Temporary hydraulic applications

Temporary hydraulic flat jacks are used where lifting, adjustment or a controlled change in load is required for a defined period. Depending on the operation, the jack may be depressurised and removed once the work is complete.

Permanent installations

For permanent applications, a suitable flat jack may be installed and filled using the specified injection procedure. The completed installation is intended to maintain the required structural force or load in accordance with the engineering design.

Transfusion systems

A transfusion arrangement is a specialist method in which a temporary hydraulic load is transferred to a permanent grout-filled load arrangement. The system and operating sequence must be designed for the particular application.

These approaches involve different equipment and procedures. The correct choice depends on the structural requirement, the flat jack design and the installation method specified for the job.


📏 Flat Jack Capacities, Shapes & Installation Heights

Flat jacks are available in a range of capacities and dimensions to suit different engineering requirements.

The available range includes capacities from approximately 1 ton to 1,240 tons, with certain models offering installation heights as low as 1.2 inches. These figures describe the overall range; not every capacity is available in every shape or installation height.

Round and rectangular flat jacks are available. The appropriate configuration depends on the load distribution, contact area, available space and structural arrangement.

When selecting a flat jack, consider:

  • Required capacity: The load the unit must support or transfer.
  • Installation height: The available gap in which the jack must fit.
  • Stroke: The required lifting or adjustment movement.
  • Shape and contact area: The configuration needed to suit the application.
  • Operating method: Hydraulic lifting, permanent filling or another specified arrangement.
  • Supporting equipment: The compatible pump, injection cylinder system, hoses and connections.

Providing accurate project information helps establish which equipment is appropriate and whether the required configuration is available.


🧰 What Equipment Is Needed to Operate a Flat Jack?

The equipment required depends on the type of flat jack and the intended operation. A conventional hydraulic lifting application may require a compatible hydraulic pump, hoses and connections. An injection-based application may require a suitable injection cylinder system and additional equipment specified for the filling procedure.

Before arranging a rental or purchase, establish the complete equipment requirement rather than selecting the flat jack in isolation.

The system may need to be checked for:

  • Compatibility between the jack and the power or injection source.
  • Required operating pressure and capacity.
  • Connection and hose specifications.
  • Required stroke and installation clearance.
  • The intended working fluid or filling material.
  • Any specialist controls, tooling or installation equipment.

The equipment must be operated within its specified limits and in accordance with the manufacturer’s instructions and the project’s engineering requirements.


🏢 Flat Jack Equipment Rental & Purchase Options

Different parts of a flat jack system may have different supply arrangements. Identifying these differences at the outset helps ensure that the equipment specification matches the project budget and operating requirements.

Hydraulic flat jacks

Hydraulic flat jacks may be available for rental, depending on the required model, capacity, dimensions and application.

Pumps, tools and accessories

The availability of pumps, tools, hoses and other supporting equipment depends on the particular system and the components required.

Injection cylinder systems

Injection cylinder systems can be rented or purchased, subject to the required specification and availability.

Grout-filled flat jacks

Grout-filled flat jacks for permanent installations are supplied for purchase rather than rental.

If you are unsure which arrangement is appropriate, provide the project details and identify whether the requirement is for temporary lifting, a permanent installation or a specialist transfusion system.


📋 Information Required for a Flat Jack Equipment Enquiry

To help identify the correct equipment, provide as much of the following information as possible:

  • Application: What needs to be lifted, adjusted, supported or preloaded?
  • Required capacity: The specified load in tons.
  • Available installation height: The maximum height available for the jack, in inches.
  • Required stroke: The lifting or adjustment movement needed, in inches.
  • Jack configuration: Round, rectangular or another specified design.
  • Operating method: Temporary hydraulic operation, permanent grout-filled installation or transfusion.
  • Equipment required: Flat jack only, pump and accessories, injection cylinder system or a complete equipment arrangement.
  • Rental or purchase: Which supply option is required for each component.
  • Project location and timing: Where and when the equipment is needed.

Drawings, specifications, photographs and engineering notes can help clarify the requirements. Final equipment selection should be based on the actual load conditions, the manufacturer’s specifications and the applicable engineering design.


📞 Flat Jack Equipment & Systems

Whether you require hydraulic flat jacks for a temporary structural operation, pumps and tools to operate them, an injection cylinder system, or grout-filled flat jacks for a permanent installation, selecting the correct equipment is essential.

Custom Rentals can help you identify the equipment required for your application and establish which items are available for rental or purchase.

Call 866-522-5464 or request a quote online with your load requirements, installation dimensions and project details.

The more information you provide, the easier it is to identify a suitable flat jack configuration and the supporting equipment needed to complete the job.

frequently asked questions about Flat Jack Systems
flat jack systems

Yes. Round and rectangular configurations are available.

flat jack systems

The available range includes capacities from approximately 1 ton to 1,240 tons, with certain models having installation heights as low as 1.2 inches.

flat jack systems

A transfusion system transfers a temporary hydraulic load to a permanent grout-filled load arrangement.

flat jack systems

Hydraulic flat jacks are commonly used for temporary lifting or adjustment, while grout-filled flat jacks are used in suitable permanent structural applications.

flat jack systems

Injection cylinder systems can be rented or purchased; the availability of other components depends on the required equipment.

flat jack systems

A compatible hydraulic pump and the necessary hoses and connections are typically required.

flat jack systems

Hydraulic flat jacks may be available for rental, depending on the required model and application.

flat jack systems

A flat jack system uses a low-profile jack and compatible operating equipment to apply controlled lifting force or transfer loads in structural applications.

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