Helical pile guide
Understanding helical piles.
A plain-language look at what helical piles are, where they are used, and what affects whether they suit a given project.
What helical piles are
A helical pile is a steel foundation element: a shaft with one or more screw-shaped plates. It is rotated into the ground and used to support structures by transferring load to suitable soil below.
How they work
As the pile is rotated, the helix plates draw it downward. Once installed, load from the structure moves along the shaft and is carried by soil bearing against the helix plates. The result depends on soil conditions and pile configuration.
Typical applications
Helical piles are commonly considered for decks, porches, small structures, and some commercial foundation needs, as well as other situations where a deep foundation element may be appropriate.
Installation methods
Installation generally uses hydraulic drive equipment that rotates the pile into the soil to a specified depth or torque target. Equipment choice depends on access, pile size, and project requirements.
Illustrative diagram — not to scale.
Compared with conventional foundations
Where they can help.
- Can often be installed without large excavation, depending on site and design
- Installation can be relatively quick compared with some conventional foundation methods
- Can be installed in a range of site conditions when properly specified
- May allow construction to proceed soon after installation, per project requirements
Advantages depend on the project. Conventional foundations remain the better choice in some situations.
Important considerations
Before you decide.
Site & soil considerations
Soil type, layering, groundwater, rock, and buried obstructions all affect whether helical piles suit a site and how they should be configured. Helical piles are not suitable for every soil condition.
Load capacity & engineering
Pile size, plate configuration, depth, and capacity are determined by licensed engineers or other qualified professionals based on the structure and soil data. Nasvai installs to the specifications provided.
Inspection & permitting
Permit and inspection requirements vary by city, county, and project type. Always confirm requirements with your local building authority before work begins.
Request a Quote
Tell us about the ground. We'll plan the foundation.
Share your project location and scope. We'll follow up to discuss site conditions, requirements, and next steps.