Helical Screw Piles

Screw piles are steel piles rotated into the ground, whereas traditional concrete piles are usually bored, driven or cast into place. The main differences are installation speed, excavation needs, ground disturbance, curing time and site access requirements.

Ultimately, screw piles are often chosen for projects that need faster installation, less excavation and reduced site disruption. Concrete piles may be preferred for some large-scale, high-load or highly specific ground engineering applications.

The right option depends on the structure, soil profile, access, loads, budget and engineering design. At The RIX Group, we can provide you with tailored advice on the most reliable and cost-effective solution for your site.

There are many different types of screw piles, which vary based on shaft size, helix size, number of helices, installation depth and whether the pile needs to resist compression, tension or lateral loads.

The main screw pile types include:

• Small-diameter screw piles: Used for lighter structures such as decks, residential extensions, small buildings and tight-access projects.
• Large-diameter screw piles: Designed for higher load requirements, including commercial buildings, industrial structures, bridges and retaining systems.
• Single-helix screw piles: Often used where ground conditions and load requirements can be met with one bearing plate.
• Multi-helix screw piles: Used when extra bearing capacity is needed, especially in softer or variable ground.
• Compression screw piles: Engineered to carry downward loads from buildings, slabs, columns and structural footings.
• Tension screw piles: Designed to resist uplift forces, making them useful for towers, masts, solar structures, anchors and wind-exposed assets.
• Lateral-load screw piles: Made to manage sideways forces, often used for retaining walls, signs, poles and infrastructure projects.

The right screw pile type depends on the engineering design, site access, soil conditions and load requirements. Contact us today for more information.

Screw piles are commonly used for residential, commercial, civil, infrastructure and renewable energy projects that demand fast, engineered foundation support with minimal excavation.

Common screw piling applications include:

• Residential builds and extensions, including new homes, additions, decks and granny flats
• Commercial and industrial structures that require strong foundation support in varied ground conditions
• Retaining walls and bridge works, where piles may need to resist compression, uplift and lateral loads
• Solar farm foundations, including ground-mounted solar arrays and renewable energy infrastructure
• Boardwalks, piers and jetties, especially where low ground disturbance is important
• Light poles, signage and masts, where fast installation and reliable uplift resistance are required
• Temporary structures and relocatable buildings
• Restricted access sites, where compact installation equipment can reach areas that larger equipment cannot
• Tight urban blocks, sloped sites, sensitive environments and projects where excavation, spoil removal, or concrete curing would slow the job down

For tailored advice on whether this is the right foundation support for your project, please get in touch with our team today.

Screw piling performance depends on how well the pile design matches the ground conditions, structure and required loads. The most important factors to consider include:

• Soil type: Clay, sand, silt, fill and mixed ground all affect how a screw pile carries load. Softer or variable soils may need deeper piles, larger helices or a different pile configuration.
• Moisture levels: Wet or changing ground conditions can affect soil strength, friction and load transfer, especially in reactive or poorly drained sites.
• Helix size and layout: Larger or multiple helices can increase bearing area and improve performance in softer soils, depending on the approved design.
• Shaft diameter and wall thickness: The steel shaft must be sized to suit the structural loads, installation torque and site conditions.
• Pile length and depth: Deeper installation can help the pile reach stronger ground layers and improve resistance to compression, uplift and lateral loads.
• Installation torque: Torque readings help indicate how the pile is performing during installation. They should be checked against the engineering design and any required testing.
• Load requirements: Screw piles may need to resist compression, tension, lateral loads or a combination of all three, depending on the structure.

A proper site assessment and engineered pile design help ensure each screw pile is installed to the right depth, capacity and specification.

Soil conditions determine how screw piles are designed, installed and verified. The soil profile affects pile depth, shaft diameter, helix size, installation torque and the load capacity each pile can achieve.

Clay, sand, silt, fill and mixed ground all behave differently under load:

• Clay may provide strong bearing resistance, but it can move with moisture changes
• Sand may require deeper installation into denser layers
• Silt can vary in strength depending on moisture and compaction 
• Fill needs careful assessment because its depth and consistency can change across the site
• Mixed soil profiles may require a more tailored pile design, as load capacity can vary between layers across the same site

Before installation, we review site-specific ground conditions to ensure the screw pile design suits the structure, soil and required loads. This helps engineers confirm the right pile specification for compression, tension and lateral performance.

Screw piles can last for decades when they are correctly designed, manufactured and installed for the site conditions.

Many permanent screw pile systems are designed for a service life of 50 years or more, depending on soil type, corrosion risk, pile specification and engineering requirements.

Maintenance is usually minimal once the piles are installed. Hot-dip galvanised steel helps to provide corrosion protection, while projects in challenging ground conditions, such as saline, acidic or contaminated soils, may need additional protective coatings or project-specific corrosion allowances.

For permanent structures, inspections may be recommended if ground conditions change, drainage issues develop or exposed pile connections are accessible.

Yes. We design and install screw piling in line with AS 2159: Piling, Design and Installation, with piles manufactured to the approved specifications.

Each project is backed by clear documentation, including pile layouts, design loads, installation records and certification where required.

Testing can also be completed when specified, giving you confidence in the pile system’s long-term structural performance.

Smaller residential screw piling projects can be completed in one day, while larger commercial, civil or mining projects may take several days or weeks.

The exact duration depends on site access, number of piles, pile depth, required load capacity, testing requirements, and ground conditions.

Before any work begins, we will provide a clear installation schedule so that you can move forward with confidence in your timeline.

Yes. Screw piling is often well-suited to restricted access sites because it is generally installed using compact equipment with less excavation than many traditional piling methods.

Our team can complete piling works on narrow blocks, tight residential sites, built-up commercial areas and locations where larger rigs may not be practical.

Before installation, we assess access, ground conditions and project requirements to determine the most suitable installation approach and equipment.

Yes. Our screw piling contractors work on construction projects across Australia and throughout the Asia Pacific. Contact us to discuss your requirements and organise services for your site.