Updated 2026-09-07

Building Code Glossary

Wall, Load-bearing: Building Code Definition

How the IBC 2009 define wall, load-bearing, 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.

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Direct answer

Wall, load-bearing is a defined term in the International Building Code (IBC) 2009, in Definitions. The code's own words are: “Any wall meeting either of the following classifications:” 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 16 chapters of this corpus, most often in Floors (IRC 2009), Wall Construction (IRC 2009), Roof-ceiling Construction (IRC 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?

Wall, Load-bearing — IBC 2009, Definitions:

Any wall meeting either of the following classifications:

Labeled code-term definition diagram: Wall, Load-bearing: Building Code Definition — How the IBC 2009 define wall, load-bearing, where the wording differs, and which chapters depend on the term.

What must be verified before using this guidance?

Wall, Load-bearing is defined once in this corpus, in the Definitions chapter of the International Building Code (IBC) 2009:

Any wall meeting either of the following classifications:

Where wall, load-bearing is used in the code

The term appears in 16 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.

Chapter	Code	Mentions
Floors	IRC 2009	28
Wall Construction	IRC 2009	25
Roof-ceiling Construction	IRC 2009	10
Masonry	IBC 2009	9
Structural Design	IBC 2009	9
Fire and Smoke Protection Features	IBC 2009	8
Wood	IBC 2009	6
Concrete	IBC 2009	4
Foundations	IRC 2009	3
Definitions	IRC 2009	2
Definitions	IBC 2009	1
Existing Structures	IBC 2009	1

4 further chapters mention the term.

The term in use

How the code actually writes about wall, load-bearing, quoted from the 2009 text hosted here:

Floor to foundation or load-bearing wall connections.

— IRC 2009 §R505.3.1

When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie not less than 0.054 inch thick (1.37 mm) (16 ga) and 1½ inches (38 mm) wide shall be fastened across and to …

— IRC 2009 §R602.6.1

Ceilingjoists shall be connected to the top track of the load-bearing wall in accordance with Table R804.3, either with two No.10 screws applied through the flange of the ceiling joist or by using a 54 mil (1.37 mm) clip angle with two No.10 screws in each leg.

— IRC 2009 §R804.3.2.4

Wall, Load-bearing: 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	Definitions
Re-check the requirement that uses it	Floors (IRC 2009)
Re-check the requirement that uses it	Wall Construction (IRC 2009)
Re-check the requirement that uses it	Roof-ceiling Construction (IRC 2009)
Re-check the requirement that uses it	Masonry (IBC 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.

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 wall, load-bearing?

The International Building Code (IBC) 2009 defines it in Definitions as: “Any wall meeting either of the following classifications:” 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 wall, load-bearing?

In this corpus the term is used across 16 chapters, led by Floors in the IRC 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.

Is a 4 inch wall load-bearing?

In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Definitions: “Any wall meeting either of the following classifications:” 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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