Building Code Glossary
System: Building Code Definition
How the IFC 2009 define system, 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
System is a defined term in the International Fire Code (IFC) 2009, in Hazardous Materials-general Provisions. The code's own words are: “An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.” No other I-Code in this corpus defines it, so the IFC 2009 definition is the one to work from. The term is used in 155 chapters of this corpus, most often in Fire Protection Systems (IFC 2009), Fire Protection Systems (IBC 2009), Special Detailed Requirements Based on Use and Occupancy (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?
System — IFC 2009, Hazardous Materials-general Provisions:
An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.
What must be verified before using this guidance?
System is defined once in this corpus, in the Hazardous Materials-general Provisions chapter of the International Fire Code (IFC) 2009:
An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.
Where system is used in the code
The term appears in 155 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 Protection Systems | IFC 2009 | 1407 |
| Fire Protection Systems | IBC 2009 | 1190 |
| Special Detailed Requirements Based on Use and Occupancy | IBC 2009 | 641 |
| Exhaust Systems | IMC 2009 | 554 |
| Commercial Energy Efficiency | IECC 2009 | 409 |
| Motor Fuel-dispensing Facilities and Repair Garages | IFC 2009 | 385 |
| Flammable and Combustible Liquids | IFC 2009 | 369 |
| Fire and Smoke Protection Features | IBC 2009 | 357 |
| Fuel Gas | IRC 2009 | 357 |
| Hazardous Materials-general Provisions | IFC 2009 | 309 |
| Building Services and Systems | IFC 2009 | 292 |
| Semiconductor Fabrication Facilities | IFC 2009 | 290 |
143 further chapters mention the term.
The term in use
How the code actually writes about system, quoted from the 2009 text hosted here:
The fire code official shall have the authority to require construction documents and calculations for all fire protection systems and to require permits be issued for the installation, rehabilitation or modification of any fire protection system.
No person shall remove or modify any fire protection system installed or maintained under the provisions of this code or the International Fire Code without approval by the building official.
Required means of egress for anchor bUildings shall be provided independently from the mall means of egress system.
The terms system 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 system covers:
- Equipment — IRC 2009: All piping, ducts, vents, control devices and other components of systems other than appliances that are permanently installed and integrated to provide control of environmental conditions for buildings.
- Container — IFC 2009: A vessel of 60 gallons (227 L) or less in capacity used for transporting or storing hazardous materials.
- Piping — IRC 2009: Where used in this code, “piping” refers to either pipe or tubing, or both.
System: 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 IFC | Hazardous Materials-general Provisions | |
| Re-check the requirement that uses it | Fire Protection Systems (IFC 2009) | |
| Re-check the requirement that uses it | Fire Protection Systems (IBC 2009) | |
| Re-check the requirement that uses it | Special Detailed Requirements Based on Use and Occupancy (IBC 2009) | |
| Re-check the requirement that uses it | Exhaust Systems (IMC 2009) | |
| Confirm the dependent definition | Equipment | |
| Confirm the dependent definition | Container | |
| Confirm the dependent definition | Piping | |
| 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
- Equipment: Building Code Definition
- Container: Building Code Definition
- Piping: 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 system?
The International Fire Code (IFC) 2009 defines it in Hazardous Materials-general Provisions as: “An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.” 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 system?
In this corpus the term is used across 155 chapters, led by Fire Protection Systems in the IFC 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 the definition of building system?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IFC 2009 states, in Hazardous Materials-general Provisions: “An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.” It is defined in IFC 2009. It is not the same as Building, which the IBC 2009 defines separately as “Any structure used or intended for supporting or sheltering any use or occupancy.” 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 is the definition of a code system?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IFC 2009 states, in Hazardous Materials-general Provisions: “An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.” It is defined in 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 is the definition of a building code?
Building is a separate defined term. The IBC 2009 defines it as: “Any structure used or intended for supporting or sheltering any use or occupancy.” That is not the same as system, which the IFC 2009 defines as “An assembly of equipment consisting of a tank, container or containers, appurtenances, pumps, compressors and connecting piping.” — read both before applying either, and confirm the wording in the edition your jurisdiction has adopted.
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