What Is the Difference Between Ground Screws and Screw Piles?

If you’re researching alternative foundations, one of the most common questions is: what is the difference between ground screws and screw piles?

It’s an easy confusion to make.

Both ground screws and helical screw piles are installed by screwing into the ground, and both are used instead of traditional concrete foundations. However, they are designed for very different applications.

At ABC Anchors (Helical Screw Pile Manufacturers), we often explain this distinction - so here’s a clear and simple breakdown.

Quick Answer: Ground Screws vs Screw Piles

To answer the question directly:

• Ground screws are used for lightweight, non-structural applications

• Screw piles (helical piles) are used for load-bearing, structural foundations

In simple terms:

• Ground screws are for smaller projects

• Screw piles are for supporting buildings and heavier loads

The difference between ground screws and screw piles is that ground screws are used for lightweight, non-structural applications, while screw piles (helical piles) are engineered to support structural loads. Screw piles are designed using load calculations and installed to meet specific performance requirements.

What Are Ground Screws?

Ground screws are a fast, lightweight foundation solution designed for smaller structures. They are typically made from steel and feature a threaded shaft that allows them to be screwed into the ground using handheld or compact machinery.

Ground screws are commonly used for:

• Decking and fencing

• Sheds and outbuildings

• Temporary structures

Their biggest advantage is speed and simplicity. There’s no excavation, no concrete, and installation can often be completed in a matter of hours.

Because of this, ground screws are ideal for:

• DIY installations

• Sites with restricted access

• Projects where minimal ground disturbance is important

What Are Screw Piles (Helical Screw Piles)?

Screw piles - also known as helical piles - are a more advanced, engineered foundation system designed to support structural loads.

They consist of a central steel shaft with one or more helical plates welded to it. These plates allow the pile to transfer loads deep into stable soil layers.

At ABC Anchors, screw piles are specifically designed and manufactured to meet structural and load-bearing requirements across a wide range of applications.

Screw piles are typically used for:

• House extensions

• Modular buildings

• Commercial construction

• Bridge foundations

• Subsidence repairs

• Infrastructure and utility projects

Unlike ground screws, screw piles are installed to calculated torque values and often require engineering input to ensure performance and compliance.

Key Differences Between Ground Screws and Screw Piles

1. Load Capacity

This is the most important difference.

• Ground screws are suitable for light loads

• Screw piles are designed for high load-bearing applications

If you’re supporting anything structural, screw piles are the safer and more reliable option.

2. Engineering and Design

Ground screws are generally selected based on basic project needs and soil type.

Screw piles, however, are:

• Engineered using site-specific data

• Installed to precise torque requirements

• Tested to confirm load capacity

At ABC Anchors, this engineering process ensures every screw pile performs as expected.

3. Installation Methods

Ground screws can often be installed using:

• Handheld equipment

• Small portable machinery

Screw piles typically require:

• Excavators or larger machinery

• High-torque drive heads (hand-held options available)

This allows screw piles to reach greater depths and achieve higher load capacities.

4. Depth and Ground Conditions

Ground screws are usually installed at shallower depths and work best in consistent ground conditions.

Screw piles can:

• Be installed deeper into the ground

• Perform in more challenging soil conditions

• Transfer loads to stronger strata below

This makes screw piles far more versatile for construction projects.

5. Applications

To summarise:

• Use ground screws for lightweight, non-structural projects

• Use screw piles (helical piles) for structural, load-bearing foundations

Choosing the correct system is essential for long-term stability and performance.

Why Are Ground Screws and Screw Piles Often Confused?

The confusion usually comes down to terminology.

Both systems:

• Are screwed into the ground

• Replace concrete foundations

• Use similar installation principles

However, the key difference lies in engineering and performance.

Ground screws are designed for convenience and speed, while screw piles are designed for strength and structural reliability.

Which One Should You Choose?

If you’re deciding between ground screws and screw piles, ask yourself:

• Are you building something structural?

• Do you need building regulations approval?

• How much load needs to be supported?

If the answer involves supporting a building or significant weight, helical screw piles are the correct solution.

For smaller projects like decking or sheds, ground screws are often more than sufficient.

At ABC Anchors, our helical pile range includes the 60R, 76R, and 89R screw piles, each designed to suit different load requirements and ground conditions. The 60R is ideal for lighter structural applications and restricted access sites, while the 76R offers increased capacity for residential builds and extensions. For heavier-duty projects, the 89R provides enhanced strength and torque performance, making it suitable for more demanding commercial and infrastructure applications. This range ensures a flexible, engineered solution for a wide variety of foundation needs.

Final Thoughts

So, what is the difference between ground screws and screw piles?

Ground screws are a quick, cost-effective solution for lightweight projects, while screw piles are engineered foundation systems designed to support structural loads.

Both have their place - but they are not interchangeable.

With support from ABC Anchors, you can ensure you’re choosing the right foundation solution for your project, backed by engineering expertise and proven performance.