# Primary Containment: Building Code Definition > How the IFC 2009 define primary containment, where the wording differs, and which chapters depend on the term. - Canonical: https://harth.build/resources/glossary/primary-containment/ - Last updated: 2026-09-07 - Data source: 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. ## Key facts | Fact | Value | | --- | --- | | Defined in | IFC 2009 (2009 editions transcribed in this corpus) | | Primary source | IFC 2009 Definitions (model text, not a jurisdiction's adopted text) | | Chapters using the term | 3 (counted across the codes hosted here) | | Wording identical across codes | Single code (compare before citing one code's wording under another) | ## Direct answer Primary containment is a defined term in the International Fire Code (IFC) 2009, in Definitions. The code's own words are: “The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained.” 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 3 chapters of this corpus, most often in Definitions (IFC 2009), Flammable and Combustible Liquids (IFC 2009), Hazardous Materials-general Provisions (IFC 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](https://nz.linkedin.com/in/barrington), Harth founder and architectural technology specialist · Published 2026-09-07 · Updated 2026-09-07.* ## What does this term mean? **Primary Containment** — IFC 2009, Definitions: > The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained. ![Labeled code-term definition diagram: Primary Containment: Building Code Definition](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/glossary/primary-containment/diagram-1344.webp) *How the IFC 2009 define primary containment, where the wording differs, and which chapters depend on the term.* ## What must be verified before using this guidance? **Primary Containment** is defined once in this corpus, in the [Definitions](https://harth.build/resources/building-codes/us-states/rhode-island/ifc-2009/definitions.md) chapter of the International Fire Code (IFC) 2009: > The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained. ## Where primary containment 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 | | --- | --- | --- | | [Definitions](https://harth.build/resources/building-codes/us-states/rhode-island/ifc-2009/definitions.md) | IFC 2009 | 1 | | [Flammable and Combustible Liquids](https://harth.build/resources/building-codes/us-states/rhode-island/ifc-2009/flammable-and-combustible-liquids.md) | IFC 2009 | 1 | | [Hazardous Materials-general Provisions](https://harth.build/resources/building-codes/us-states/rhode-island/ifc-2009/hazardous-materials-general-provisions.md) | IFC 2009 | 1 | ## The terms primary containment is built out of The definition above leans on 1 other defined term. Each carries its own code definition, and a local amendment to any of them changes what primary containment covers: - **[Container](https://harth.build/resources/glossary/container.md)** — IFC 2009: A vessel of 60 gallons (227 L) or less in capacity used for transporting or storing hazardous materials. ## Primary Containment: what to open, and in what order Every row is a document this term depends on. The [ICC code library](https://codes.iccsafe.org/codes) and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) cover the middle rows. | Check | Where | Confirmed | | --- | --- | --- | | Read the definition in the adopted IFC | Definitions | | | Re-check the requirement that uses it | Definitions (IFC 2009) | | | Re-check the requirement that uses it | Flammable and Combustible Liquids (IFC 2009) | | | Re-check the requirement that uses it | Hazardous Materials-general Provisions (IFC 2009) | | | Confirm the dependent definition | Container | | | 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](https://harth.build/resources/glossary.md) - [Container: Building Code Definition](https://harth.build/resources/glossary/container.md) - [Building: Building Code Definition](https://harth.build/resources/glossary/building.md) - [Construction Documents: Building Code Definition](https://harth.build/resources/glossary/construction-documents.md) - [Registered Design Professional: Building Code Definition](https://harth.build/resources/glossary/registered-design-professional.md) ## 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](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. ### Source links - [codes.iccsafe.org](https://codes.iccsafe.org/codes) - [iccsafe.org](https://www.iccsafe.org/advocacy/code-adoption-maps/) ## Frequently asked questions ### What is the code definition of primary containment? The International Fire Code (IFC) 2009 defines it in Definitions as: “The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained.” 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 primary containment? In this corpus the term is used across 3 chapters, led by Definitions 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 does primary containment mean? In the 2009 I-Codes hosted here it is a defined term rather than a description. The IFC 2009 states, in Definitions: “The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained.” 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 primary purpose 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 primary containment, which the IFC 2009 defines as “The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained.” — read both before applying either, and confirm the wording in the edition your jurisdiction has adopted. ### What is primary containment and secondary containment? In the 2009 I-Codes hosted here it is a defined term rather than a description. The IFC 2009 states, in Definitions: “The first level of containment, consisting of the inside portion of that container which comes into immediate contact on its inner surface with the material being contained.” It is defined in IFC 2009. It is not the same as Secondary Containment, which the IFC 2009 defines separately as “That level of containment that is external to and separate from primary containment.” 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. --- - Continue in Harth (open this topic in the Harth agent): https://app.harth.build/agent?context=%2Fresources%2Fglossary%2Fprimary-containment%2F - View this page in a browser: https://harth.build/resources/glossary/primary-containment/ - All resources for agents: https://harth.build/llms.txt