Building Code Glossary
Fire Partition: Building Code Definition
How the IBC 2009, IFC 2009 define fire partition, 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
Fire partition is a defined term in the International Building Code (IBC) 2009, in Fire and Smoke Protection Features. The code's own words are: “A vertical assembly of materials designed to restrict the spread of fire in which openings are protected.” The IFC 2009 carries the same definition word for word, so the term means the same thing in each. The term is used in 15 chapters of this corpus, most often in Fire and Smoke Protection Features (IBC 2009), Existing Structures (IBC 2009), Fire Protection Systems (IBC 2009). These pages transcribe the 2009 model text; verify the definition against the edition and amendments your authority having jurisdiction has adopted. Record the jurisdiction, the adopted edition, the application date and any local amendment that rewrites the definition before you use it on a live project, because a term redefined by amendment changes every requirement that depends on it.
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?
Fire Partition — IBC 2009, Fire and Smoke Protection Features:
A vertical assembly of materials designed to restrict the spread of fire in which openings are protected.
What must be verified before using this guidance?
Two of the I-Codes in this corpus define Fire Partition, in identical words.
| Code | Where it is defined | Definition |
|---|---|---|
| IBC 2009 | Fire and Smoke Protection Features | A vertical assembly of materials designed to restrict the spread of fire in which openings are protected. |
| IFC 2009 | Definitions | A vertical assembly of materials designed to restrict the spread of fire in which openings are protected. |
Where fire partition is used in the code
The term appears in 15 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.
| Chapter | Code | Mentions |
|---|---|---|
| Fire and Smoke Protection Features | IBC 2009 | 37 |
| Existing Structures | IBC 2009 | 18 |
| Fire Protection Systems | IBC 2009 | 13 |
| Explosives and Fireworks | IFC 2009 | 13 |
| Fire Protection Systems | IFC 2009 | 12 |
| Masonry | IBC 2009 | 4 |
| Special Detailed Requirements Based on Use and Occupancy | IBC 2009 | 4 |
| Fire-resistance-rated Construction | IFC 2009 | 4 |
| Duct Systems | IMC 2009 | 4 |
| Means of Egress | IBC 2009 | 2 |
| Fire Service Features | IFC 2009 | 2 |
| Definitions | IBC 2009 | 1 |
3 further chapters mention the term.
The term in use
How the code actually writes about fire partition, quoted from the 2009 text hosted here:
Openings in a fire partition shall be protected in accordance with Section 715.
Each tenant space shall be separated from other tenant spaces by a fire partition complying with Section 709.
Oxygen manifolds shall be located at least 20 feet (6096 mm) away from combustible material such as oil or grease, and gas cylinders containing flammable gases, unless the gas cylinders are separated by a fire partition.
Fire Partition compared with Fire Barrier
These two are the closest pair in the 2009 I-Codes: about 55 per cent of their defining words are the same. The code states both and compares neither, so the difference is worth naming.
| Wording unique to it | |
|---|---|
| Fire Partition (IBC 2009) | vertical, openings, protected |
| Fire Barrier (IBC 2009) | resistance, rated, wall, continuity, maintained |
Everything else in the two definitions is shared. If a project turns on which of the two applies, those words are the whole of the test — and a local amendment that edits one of them without editing the other moves the boundary between fire partition and fire barrier.
Fire Partition: 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 | Fire and Smoke Protection Features | |
| Read the definition in the adopted IFC | Definitions | |
| Re-check the requirement that uses it | Fire and Smoke Protection Features (IBC 2009) | |
| Re-check the requirement that uses it | Existing Structures (IBC 2009) | |
| Re-check the requirement that uses it | Fire Protection Systems (IBC 2009) | |
| Re-check the requirement that uses it | Explosives and Fireworks (IFC 2009) | |
| 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
- Shaft: Building Code Definition
- Damper: Building Code Definition
- Fire-resistance Rating: Building Code Definition
- Fire Barrier: 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 fire partition?
The International Building Code (IBC) 2009 defines it in Fire and Smoke Protection Features as: “A vertical assembly of materials designed to restrict the spread of fire in which openings are protected.” 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 fire partition?
In this corpus the term is used across 15 chapters, led by Fire and Smoke Protection Features 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 fire partition?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Fire and Smoke Protection Features: “A vertical assembly of materials designed to restrict the spread of fire in which openings are protected.” It is defined in IBC 2009, IFC 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.
What's the difference between a fire barrier and a fire partition?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Fire and Smoke Protection Features: “A vertical assembly of materials designed to restrict the spread of fire in which openings are protected.” It is defined in IBC 2009, IFC 2009. It is not the same as Fire Barrier, which the IBC 2009 defines separately as “A fire-resistance-rated wall assembly of materials designed to restrict the spread of fire in which continuity is maintained.” 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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