Screw Pile Terminations: Connecting Screw Pile Foundations to Structures

A screw pile foundation needs a reliable connection to the structure it is supporting. This connection is made using a screw pile termination – the component fitted to the top of the pile that provides the interface between the foundation and the structure above.

The termination is an important part of the overall foundation system. It needs to suit the type of structure, the loads being transferred and the way the pile foundation has been designed.

At ABC Anchors, we manufacture a range of standard screw pile terminations, as well as bespoke options designed around individual projects and applications.

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What is a screw pile termination?

A screw pile termination is the connection fitted to the top of a screw pile. It provides a practical and structural interface between the pile and the building, beam, frame or other structure being supported.

Depending on the application, the termination may connect the screw pile to:

• A reinforced concrete ring beam

• Steelwork or structural steel beams

• Timber structures

• Existing foundations

• Underpinning systems

• Temporary structures

• Marine or floating structures

The termination forms part of the load path, transferring forces from the structure into the screw pile and ultimately into the surrounding ground.

For structural engineers, selecting the appropriate termination is therefore an important part of the foundation design. For contractors, the termination also needs to provide a practical connection that can be installed accurately on site.

What types of screw pile terminations are available?

The right termination depends on the application and the structure being supported. ABC Anchors manufactures a range of termination options, including rebar, flat plate, underpinning, hoop and mooring terminations.

Rebar terminations

Rebar terminations can be used where screw piles are being connected into a reinforced concrete ring beam or similar concrete structure.

The projecting reinforcement can be incorporated into the concrete reinforcement, providing a direct connection between the screw pile and the reinforced concrete structure above.

Flat plate terminations

Flat plate terminations provide a versatile connection point for applications involving steelwork, timber structures and other structural elements.

The plate can be manufactured with fixing holes or other connection details to suit the requirements of the project.

Underpinning brackets

Underpinning brackets are used where screw piles form part of an underpinning or remedial foundation system.

They provide a connection between the existing structure and the new screw pile foundation and can be particularly useful where access or existing building conditions make traditional foundation solutions difficult.

Hoop terminations

Hoop terminations provide an attachment point for applications such as temporary structures, marquees, scaffolding stabilisation and other projects where ropes, guy wires or reinforcing cables need to be secured.

Mooring terminations

For marine and underwater applications, mooring terminations provide a connection point for mooring lines, buoys and floating structures.

These demonstrate that screw piles aren't limited to conventional building foundations – the termination can be adapted to suit a wide range of applications.

Can screw pile terminations be bespoke?

Yes. Screw pile terminations can be designed and manufactured to suit specific project requirements.

Not every foundation project will work with a standard termination. The structure, connection detail, loading requirements, available space and installation conditions can all affect the termination required.

At ABC Anchors, we can manufacture bespoke screw pile terminations to suit individual applications.

This could involve adapting the dimensions, plate configuration, fixing positions, connection arrangement or overall design of the termination.

Our UK-based design and manufacturing capabilities allow us to work with contractors, structural engineers and project teams to develop a practical termination around the requirements of the project.

Why is the screw pile connection important?

The termination is the point where the screw pile foundation meets the structure above, so it needs to be considered as part of the overall foundation design.

The connection needs to accommodate the forces being transferred from the structure into the pile. Depending on the application, this can include vertical, lateral and uplift loads.

A suitable termination also needs to work in practice. The connection should be compatible with the structure and allow the pile to be installed and connected accurately on site.

Considering the termination at the design stage can help ensure that the foundation and structure work together as intended.

Screw pile terminations for different applications

One of the advantages of screw pile foundations is their versatility. They can be used across a wide range of projects, from buildings and extensions to retaining structures, temporary installations and marine applications.

The termination can be adapted accordingly.

For example, a structural engineer designing a new building may require a termination that connects directly into a reinforced concrete beam, while an underpinning project may require a bracket designed to connect the new pile to an existing foundation.

For a temporary structure, the priority may instead be providing a secure and easily accessible attachment point.

The pile provides the foundation, but the termination provides the connection.

Bespoke screw pile terminations from ABC Anchors

At ABC Anchors, we don't believe every project should be forced to fit a standard connection.

Our range of screw pile terminations covers a variety of common applications, while our manufacturing capabilities allow us to develop bespoke screw pile connections where required.

We can work with contractors and structural engineers to understand the application and develop a termination that suits the proposed structure, connection detail and installation requirements.

If you have a project that requires a non-standard screw pile termination, speak to the ABC Anchors team to discuss your requirements.

Frequently Asked Questions

What is a screw pile termination?

A screw pile termination is the component fitted to the top of a screw pile that connects the foundation to the structure above. It provides the interface between the screw pile and elements such as concrete beams, steelwork, timber structures or existing foundations.

What is the purpose of a screw pile termination?

The purpose of a screw pile termination is to provide a suitable structural connection between the screw pile foundation and the structure it supports. The termination forms part of the load-transfer path between the structure and the ground.

Can screw pile terminations be bespoke?

Yes. ABC Anchors can manufacture bespoke screw pile terminations for projects where a standard termination isn't suitable. Dimensions, fixing arrangements, plate configurations and other details can be adapted to suit the application.

What type of termination do I need for a screw pile?

The correct termination depends on the structure being supported, the connection detail and the loads that need to be transferred. Structural engineers should specify the appropriate termination as part of the overall foundation design.

Can screw piles be connected to concrete?

Yes. Screw piles can be connected to reinforced concrete structures using suitable termination details, such as rebar terminations designed to integrate with the reinforcement within a concrete beam.

Can screw piles be connected to steelwork?

Yes. Flat plate terminations and other bespoke connection arrangements can be used to connect screw piles to steel beams and structural steelwork, depending on the requirements of the project.

Do ABC Anchors manufacture screw pile terminations in the UK?

Yes. ABC Anchors designs and manufactures its screw piles and termination solutions in the UK, including bespoke terminations for specific project requirements.

Can ABC Anchors help with a non-standard screw pile connection?

Yes. If your project requires a connection that isn't covered by a standard termination, ABC Anchors can discuss the application and develop a bespoke solution to suit the project requirements.