Building Code Glossary
Helical Pile: Building Code Definition
How the IBC 2009 define helical pile, where the wording differs, and which chapters depend on the term.
On this page
Last updated September 7, 2026 · Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The [ICC code library](https://codes.iccsafe.org/codes) publishes the current model text and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) show which edition a jurisdiction has adopted; those sources control.
Direct answer
Helical pile is a defined term in the International Building Code (IBC) 2009, in Soils and Foundations. The code's own words are: “Manufactured steel deep foundation element consisting of a central shaft and one or more helical bearing plates. A helical pile is installed by rotating it into the ground. Each helical bearing plate is formed into a screw thread with a uniform defined pitch.” No other I-Code in this corpus defines it, so the IBC 2009 definition is the one to work from. The term is used in 3 chapters of this corpus, most often in Soils and Foundations (IBC 2009), Structural Tests and Special Inspections (IBC 2009), Definitions (IBC 2009). These pages transcribe the 2009 model text; verify the definition against the edition and amendments your authority having jurisdiction has adopted.
Content and cited inputs reviewed by Scott Barrington, Harth founder and architectural technology specialist · Published 2026-09-07 · Updated 2026-09-07.
What does this term mean?
Helical Pile — IBC 2009, Soils and Foundations:
Manufactured steel deep foundation element consisting of a central shaft and one or more helical bearing plates. A helical pile is installed by rotating it into the ground. Each helical bearing plate is formed into a screw thread with a uniform defined pitch.
What must be verified before using this guidance?
Helical Pile is defined once in this corpus, in the Soils and Foundations chapter of the International Building Code (IBC) 2009:
Manufactured steel deep foundation element consisting of a central shaft and one or more helical bearing plates. A helical pile is installed by rotating it into the ground. Each helical bearing plate is formed into a screw thread with a uniform defined pitch.
Where helical pile is used in the code
The term appears in 3 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.
| Chapter | Code | Mentions |
|---|---|---|
| Soils and Foundations | IBC 2009 | 27 |
| Structural Tests and Special Inspections | IBC 2009 | 2 |
| Definitions | IBC 2009 | 1 |
The term in use
How the code actually writes about helical pile, quoted from the 2009 text hosted here:
The torque applied during installation shall not exceed the maximum allowable installation torque of the helical pile.
Special inspections shall be performed continuously during installation of helical pile foundations.
The terms helical pile is built out of
The definition above leans on 3 other defined terms. Each carries its own code definition, and a local amendment to any of them changes what helical pile covers:
- Deep Foundation — IBC 2009: A deep foundation is a foundation element that does not satisfy the definition of a shallow foundation.
- Shaft — IBC 2009: An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, or floors and roof.
- Steel — IFC 2009: Hot-or cold-rolled as defined by the International Building Code.
Helical Pile: what to open, and in what order
Every row is a document this term depends on. The ICC code library and the ICC adoption maps cover the middle rows.
| Check | Where | Confirmed |
|---|---|---|
| Read the definition in the adopted IBC | Soils and Foundations | |
| Re-check the requirement that uses it | Soils and Foundations (IBC 2009) | |
| Re-check the requirement that uses it | Structural Tests and Special Inspections (IBC 2009) | |
| Re-check the requirement that uses it | Definitions (IBC 2009) | |
| Confirm the dependent definition | Deep Foundation | |
| Confirm the dependent definition | Shaft | |
| Confirm the dependent definition | Steel | |
| Local amendment to any of the above | Jurisdiction's amendment list |
A research aid, not a code determination. The authority having jurisdiction decides which edition and which amendments apply.
Where can you explore related guidance?
- Explore all glossary guidance
- Deep Foundation: Building Code Definition
- Steel: Building Code Definition
- Shaft: Building Code Definition
Sources and method
Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The ICC code library publishes the current model text and the ICC adoption maps show which edition a jurisdiction has adopted; those sources control.
Source links
Frequently asked questions
What is the code definition of helical pile?
The International Building Code (IBC) 2009 defines it in Soils and Foundations as: “Manufactured steel deep foundation element consisting of a central shaft and one or more helical bearing plates. A helical pile is installed by rotating it into the ground. Each helical bearing plate is formed into a screw thread with a uniform defined pitch.” The 2009 model text is reproduced here; the definition that binds your project is the one in the edition your jurisdiction has adopted, as amended locally.
Which parts of the code depend on helical pile?
In this corpus the term is used across 3 chapters, led by Soils and Foundations in the IBC 2009. Those are the sections whose scope moves if the definition is amended locally, so read them together with Chapter 2 rather than on their own.
What is a helical pile in construction?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Soils and Foundations: “Manufactured steel deep foundation element consisting of a central shaft and one or more helical bearing plates. A helical pile is installed by rotating it into the ground. Each helical bearing plate is formed into a screw thread with a uniform defined pitch.” It is defined in IBC 2009. Because it is a defined term, whatever the adopted edition says it means is what every section using it means — so check Chapter 2 of that edition and any local amendment before relying on this wording.
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