Helical piles go by several names in the construction industry, helical piers, screw piles, and screw anchors are all terms used to describe the same foundation solution. Whatever you call them, this guide breaks down everything property owners and builders need to know about helical piles.
Nearly 43.4% of structures begin losing structural integrity within just a few years of being built. A weak foundation is often the root cause. That's where helical piles come in a proven way to safeguard your building from costly structural damage down the road.
Curious how skyscrapers, bridges, and heavy commercial buildings manage to stay upright and stable for decades? Keep reading to learn how helical pile systems reinforce foundations and prevent structural failure.
A helical pile is a deep foundation anchoring system built from hollow steel tube sections, designed to reinforce and stabilize a structure's foundation. If you're concerned about the long-term integrity of your building's foundation, installing helical piles is one of the most effective solutions available.
Helical pile systems work for both residential and commercial construction. They're valued for their durability, fast turnaround during installation, and affordability compared to traditional deep foundation methods.
Helical piles deliver foundation support for structures of nearly every size and shape. They're driven deep into the ground to bear the weight of whatever sits above, homes, decks, commercial buildings, bridges, and more. Larger projects often require a network of multiple helical piles working together to distribute the structural load evenly.
Helical piles are fabricated from galvanized steel, a coating process that protects the pile from corrosion and rust over its lifespan. Most piles are built as round or square hollow steel shafts. Manufacturers produce them in a range of shapes and diameters depending on the specific demands of a project.
During fabrication, one or more helical steel plates (often called "flights") are welded onto the shaft. These helical flights allow the pile to be driven into the ground with rotational force, similar to how a screw threads into wood. While the pitch of these plates typically follows industry standards, the overall shaft length, diameter, and flight configuration can be customized for the application.
With proper installation and appropriate load design, helical piles can last well over 100 years, making them one of the most durable deep foundation options on the market.
Installation involves rotating the pile shaft into the ground using hydraulic torque motors. As each segment reaches ground level, an additional shaft extension is bolted or coupled on, allowing a single helical pile to extend hundreds of feet into the earth if the project requires it.
In many cases, helical piles alone provide enough load-bearing capacity to support a structure. For larger or heavier projects, they're sometimes paired with poured concrete foundations to add an extra layer of structural reinforcement.
Helical pile systems are used across both residential and commercial foundation projects, for new construction, foundation reinforcement, and foundation repair alike. They're especially valuable in poor or unstable soil conditions where traditional foundation systems tend to underperform or fail outright.
Common signs that a property could benefit from helical pile installation include:
- Cracking or splitting along interior walls
- Uneven or sloping floors
- Widening gaps around door and window frames
- Doors that stick, bind, or won't close properly
- Cracks forming in basement walls
One of the biggest benefits of using helical piles for foundation repair is speed, installation is fast and minimally disruptive, so daily operations at a home or business can continue with little interruption.
Helical piles offer several distinct advantages compared to conventional deep foundation methods:
Helical piles are screwed directly into the ground, eliminating the need for excavation. This cuts down significantly on project time, labor costs, and job-site waste. Because there's no digging involved, the surrounding area stays cleaner, and post-project cleanup is minimal.
One of the standout benefits of helical piles is that they can bear load immediately after installation. Unlike poured concrete piles, which require curing time before they can support weight, helical piles are ready to go right away. Their load capacity can also be boosted by pairing them with compact installation equipment.
Helical pile installation generates very little noise or ground vibration, making it ideal for tight urban lots, occupied buildings, or sites near sensitive structures. This low-impact installation process minimizes disruption to neighboring properties.
Because helical piles don't rely on concrete curing, they can bear structural loads the moment they're installed. In fact, their load-bearing capacity tends to improve over time, the longer a helical pile has been in the ground, the stronger its holding capacity becomes.
Helical piles are a more sustainable choice than many traditional foundation methods. Installation creates minimal ground disturbance, and most manufacturers use high-quality recycled steel in the fabrication process, reducing the overall carbon footprint of the project.
Because helical piles skip the concrete curing process entirely, they can be installed in any season, no need to wait for the ground to dry or temperatures to warm up. Whether it's the dead of winter or the middle of a rainy season, helical pile installation can move forward without delay.
Helical piles are particularly well-suited to remote job sites and properties with difficult soil conditions. Since installation doesn't require heavy machinery or large equipment, they're a practical choice in areas where mobilization costs are high and access to construction support services is limited.
