What is a screw pile?
A screw pile is steel tube made up of a helical screw tip, with a series of extensions and a flange top. Think of them as an extendable ground screw.
Our range of extendable piles ensures that foundations are installed to the required depths to achieve maximum load-bearing capacities in areas of soft ground and offer an efficient method for raising ground levels without extensive excavations. Our sustainable foundations have been engineered to produce extremely secure, strong, and stable foundations, with cutting-edge anchoring technology that allows for the direct attachment of structures to the screws head, effectively preventing any lateral or vertical movement.
Our range of screws are available in 76mm, 89mm and 114mm diameters, with extension pieces in 500mm, 1000mm, 1500mm, and 2000mm lengths, and pairing with a flange to interface between any universal or bespoke fittings. RADIX’s specialist screw piling team has installed foundations to depths exceeding 16m and 200kN per screw-pile.
In line with BS EN ISO 1461:2009 standards, our foundation screws are galvanised for enhanced durability and an extended lifespan.
Engineers’ certificates and documentation are available upon request.
RADIX installation teams are seasoned in both private and commercial projects, and specialise in screw piling with unmatched expertise.
Our screw pile range
We have a screw pile for whatever project you are building
In our depots throughout the UK, we maintain high levels of stock. Our teams are ready to supply your project with the most suitable screw foundations and supplement this with a range of services from project design to installations. No matter the time demands or challenges your site has, we can find a solution for you.
The advantages of using helical screw pile foundations for your next project
Our low-carbon foundations are installed quickly, reducing labour costs and making your project more cost-efficient. With our range of screws, you have instant load-bearing capacity, so no waiting about for concrete to dry!
There are several advantages of ground screws and screw piles, here are a few:
Our testing and quality control process ensures the strength, resilience and capabilities of every screw pile we install
We rigorously check the technical specification, quality, durability and strength of every range of screws we manufacture. RADIX proudly stands behind the calibre of our products.
If you require the empirical evidence or technical information on any of our screws, contact us.
RADIX is not only the largest stockist and supplier of helical screw pile foundations in the UK, with an experienced team of installers spread throughout the country, but we also have the best products on the market.
A turnkey service for screw pile foundations for commercial and private projects
Throughout every phase of your project—from initial engagement, through meticulous design and planning, to comprehensive site surveys, ground testing, and installations—our approach is defined by clear communication, transparency, and consummate professionalism.
Leveraging the specialised skills of our certified installers and utilising state-of-the-art machinery and equipment, we efficiently collect and analyse the essential data for your project. This strategic process ensures the successful completion of your project, both on schedule and within your budget.
Our installers are available for any private or commercial projects. From a jetty or wharf on a river bank to a battery energy storage system (BESS), or a passive house in the countryside, our helical pile foundations will stand the test of time.
Site Surveys & Load Testing
We can provide the empirical data on which ground screws and screw piles are specified for your project.
Project Design & Planning
Our experienced team can help design the foundations and structural base to meet your project specifications.
Meet the team and machines we use to install our screw pile foundations
Screw piling is typically required when we need to go deeper into the ground, we have sloped land, and the load capacity of the structure demands a deeper, stronger and extendable screw. Our teams and machines that we use for screw piling are second to none.
What can you build on helical screw pile foundations?
Just like our ground screw applications, there are many structures you can build on screw pile foundations. Screw piling should be used over ground screws when we need to go deeper to gain the required load-bearing capacities a project demands, or to quickly raise levels over areas of sloping ground.
From large-scale commercial projects like substations, transformers, or PCS units that support renewable energy projects, to a new garden office over undulating ground, helical screw piles can deliver a strong, stable and level foundation.
Screw pile prices and quotation
We need to analyse your project to be able to generate an exact quote for you, as many factors will determine which foundation screw is best suited for your project. This includes taking into consideration total load capacities and your site’s ground conditions.
At RADIX, the integrity of your structure’s foundations is paramount to us. Contact us so we can go through our evaluation process and make sure your structure will be on secure foundations for many years to come.
Are there other types of piles similar to our helical piles used in construction?
There are many different types of piling systems used in construction. RADIX Helical Screw Piles should not be confused with traditional pile systems that most people are familiar with. Our helical screw piles are a uniquely designed hybrid system, value-engineered to deliver a more cost-effective solution for large-scale and heavy structures. Traditional piles are not only more expensive, but require a different method of installation which can include boring or driving piles in by impact, which requires heavy machinery and large piling mats.
Other types of piles used in construction include; CFA Piles (Continuous Flight Auger Piles), Sheet Piles, Micro Piles (or Mini Piles), Helical Piles, Bored Piles (or Drilled Shafts), Driven Piles, Caisson Piles, Composite Piles, Prestressed Concrete Piles, Timber Piles, Tension Piles and even more.
Screw pile FAQ
Below you will find some of the questions customers have asked us about our screw pile foundations, our screw piling installations, and other services we offer. If you cannot find the answer to your question, then please contact us, and we’ll be happy to help.
The load capacity of a screw pile is dependant on several factors, including the ground conditions for frictional load, or achieving the depth for a point load and the structural integrity of our foundations.
Our expert teams have installed to depths of 16m before, supporting 200kN per screw pile for a bridge construction project.
Our foundations can go as deep as required. We have done installations nearing 20m deep.
A ground screw is a set length, whereas a helical screw pile can be extended to reach the depths required to optimise the stability of the above structure. A pile differs from a ground screw by the helical blade that is added to the screw tip part of the pile, this increases the load capacity, strength and support of the device. Both can support large structures, but the ground, weight dispersement and the structure’s load are all taken into consideration when choosing which screw is better to use.
A helical pile and a ground screw, while similar in function and appearance, have some differences:
Design and Application:
- Helical Screw Pile: Traditionally larger and longer, screw piles are designed for deep foundations. They are often used in heavy construction, like supporting houses, bridges, battery energy storage systems, ground-mounted solar panels.
- Ground Screw: Generally smaller (our maximum length is 2100mm), ground screws are suited for applications such as securing decks, fences, garden rooms and smaller solar arrays, but it is the ground conditions and load that determine which is used.
- Helical Screw Pile: They have a higher load-bearing capacity due to their size and depth, making them suitable for supporting substantial structures.
- Ground Screw: While highly effective, they are typically used for lighter loads when we make a decision.
- Helical Screw Pile: Their installation might require our larger installation machinery due to their size and the depth they need to reach.
- Ground Screw: These can often be installed with our portable ground screw machines
Cost and Efficiency:
- Helical Screw Pile: The cost might be higher due to the materials and installation process, but they provide robust support for larger projects.
- Ground Screw: More cost-effective for smaller-scale projects, offering quicker and easier installation.
Both serve the purpose of providing stable foundations but are chosen based on the scale and requirements of the project.
A pile is a long, slender column made of strong materials like wood, steel, or concrete, which is driven deep into the ground to provide foundational support for various types of structures. Piles are used in construction when the surface soil’s load-bearing capacity is insufficient to support the weight of the building. They transfer the load from the structure above to the stronger, more stable soil or rock layers deep below the surface. Piles are essential in supporting bridges, buildings, and other structures, especially in areas with weak or unstable soil.
RADIX Screw Piles replace the need and expense of traditional piles in many cases, subject to project requirements and ground conditions.
Screw piles can be a smarter and more cost-effective solution to concrete and traditional piles in many cases. The actual cost of a helical screw pile is determined by the size and length of pile you need for your particular project. To find an exact answer of the price, contact us to evaluate your project and generate a quote for you.
We use a variety of machines for screw piling depending on the demands of the project. We can install hundreds of screws per day with our team and multiple machines, which help speed up the project’s timeline. Have a look at our screw piling machines.
* A RADIX Screw Pile must be selected based on static calculations and results of site-specific ground testing. The manufacturer is not liable for damage caused by insufficient or incorrect selection of screw pile foundations.