What this module covers
Code Administration is only 4% of the B1 outline, so expect two or three of the 60 questions. It still comes first, because every later module builds on it. The exam is open book: 60 questions in 2 hours, about two minutes each.
You will learn the IRC's layout, set up your book with tabs, and practice a three-step drill for every question: question type, where to go, what to check. Then two short lessons cover the administrative rules an inspector uses every day.
Keep your own IRC open. We cite chapters, sections and tables by number only and never quote the text.
Finding your way around the IRC
How a section number reads
R403 is Chapter 4, Section 3. Each decimal goes one level deeper: R403.1 sits inside R403, and R403.1.4 is narrower still. Tables and figures carry the number of the section they belong to, so a table numbered under R403.1 lives inside R403.1.
The chapter map
| Chapter | What it holds | Inspector use |
|---|---|---|
| 1 | Scope and administration | Permits, inspections, certificate of occupancy, violations |
| 2 | Definitions | What a term means in code language |
| 3 | Building planning | Design criteria tables, fire separation, rooms, glazing, egress, stairs, alarms, decay, flood |
| 4 | Foundations | Soils, footings, foundation walls, drainage, dampproofing, under-floor space |
| 5 | Floors | Joists, spans, notching, subfloor, slabs |
| 6 | Wall construction | Studs, headers, fastening, bracing, masonry and concrete walls |
| 7 | Wall covering | Interior finishes, siding, weather barriers, veneer, stucco |
| 8 | Roof-ceiling construction | Rafters, ceiling joists, trusses, attic ventilation and access |
| 9 | Roof assemblies | Underlayment, roof coverings, reroofing |
| 10 | Chimneys and fireplaces | Masonry and factory-built fireplaces and chimneys |
| 11 | Energy efficiency | Insulation and envelope (numbered N11xx) |
| 12 to 23 | Mechanical | Equipment, ducts, exhaust, combustion air |
| 24 | Fuel gas | Gas piping and appliances |
| 25 to 33 | Plumbing | Fixtures, water supply, drainage, vents |
| 34 to 43 | Electrical | Services, circuits, wiring, devices |
| 44 | Referenced standards | Full titles of standards the code cites |
| Appendices | Optional rules | Apply only where the jurisdiction adopts them |
B1 lives almost entirely in Chapters 1 to 10. Do not spend tabs on the energy and trade chapters.
Two habits that save minutes
- Chapter 3 is a crossroads. Many rules that feel like "walls" or "foundations" sit in Chapter 3: fire separation, decay protection, flood construction and the climate design table. When a topic is about safety or site conditions, try Chapter 3 first.
- Use the index for words, the chapter map for topics. If the question uses an odd term, go to the index. If you know the topic, go straight to the chapter.
Your tab plan
ICC allows bound copies of the referenced IRC, and tabs and highlighting are commonly allowed. Check the current ICC candidate bulletin before exam day for the exact rules on tabs and handwritten notes. If you take the exam with the digital book, practice its search tool instead.
Use two rows of tabs so chapters and tables never compete:
| Tab row | Where on the book | Tab these |
|---|---|---|
| Chapters | Side edge, one tab per chapter | Chapters 1 to 10, Chapter 44, the index |
| Key tables | Top edge, in a second color | Climatic and geographic design criteria (R301.2), live loads (R301.5), exterior wall fire separation (R302.1), dwelling and garage separation (R302.6), presumptive soil values (R401.4.1), footing tables (R403.1), foundation wall tables (R404.1), fastening schedule (R602.3), wall bracing (R602.10), floor joist and rafter span tables (R502, R802) |
Write the section number on each tab, not a nickname. "R403.1" sends you to the page; "footings" makes you search again. Highlight only section titles and table titles, so your eye can scan the page.
The look-it-up drill
Practice every topic in this form until it is automatic:
| Question type | Where to go | What to check |
|---|---|---|
| Does this work need a permit? | Chapter 1, R105 | The exempt work list, then any local amendment |
| What does this term mean? | Chapter 2, R202 | The defined term, then the section that uses it |
| What is the frost depth or snow load? | Chapter 3, R301.2 table | The value the jurisdiction filled in for its area |
| How close can a wall be to the lot line? | Chapter 3, R302.1 | The right table, sprinklered or not |
| Is this footing big enough? | Chapter 4, R401.4 then R403.1 | Soil value, number of stories, construction type |
What the exam tests here. Speed. Many questions are easy once you are on the right page.
Permits, plans and accepted products
Scope first
Section R101 sets which buildings the IRC covers: detached one and two family dwellings and townhouses within a height limit, plus their accessory structures. A building outside that scope goes to the IBC. Section R102 explains how the IRC relates to other codes and standards. R102.1 settles conflicts inside the code: when sections simply differ, the more restrictive wins, but a specific requirement beats a general one.
Permits and construction documents
- R105 Permits. Who needs a permit, what work is exempt, how long a permit stays valid and what makes it expire.
- R106 Construction documents. What the applicant submits, how the jurisdiction reviews it, and what happens to the reviewed set. The inspector checks the work against that reviewed set, so the set must be on site.
Products the code does not name
The IRC cannot list every product. Section R104 gives the jurisdiction's enforcement head, called the AHJ here, the power to accept an alternative material, design or method when the applicant shows it is at least equivalent. Evidence is usually a test report or an evaluation report from an accredited evaluation service. Once accepted, the product is installed according to that acceptance and the manufacturer's instructions.
When a later chapter says a product must be listed or labeled, the inspector's job is to find the evidence: a mark on the product, or paperwork tying it to a testing agency's evaluation for that use. Chapter 2 defines both words; read them there, then note which later sections rely on them.
What the exam tests here. Who decides (the AHJ, on evidence, not the inspector by eye) and that accepted products still follow their installation instructions.
Inspections, notices and the certificate of occupancy
The inspection sequence
Section R109 ties inspections to the stages of the build. Think of it as "look before it gets covered": footings and foundation before concrete, rough-ins before walls close, framing before cover, and a final before move in. Floodplain documentation is checked at its own points where a flood zone applies. Work should not move past a stage until that stage passes. If work is covered too early, the AHJ can require it to be exposed.
When something is wrong
| Situation | Tool | Where |
|---|---|---|
| Work does not meet the code | Notice of violation | R113 |
| Work is unsafe or against the code and must halt now | Stop work order | R114 |
| Applicant disagrees with a decision | Appeal | R112 |
Certificate of occupancy
The certificate of occupancy (R110) is the gate between construction and living in the house. The same section deals with temporary certificates for part of a building and with revoking a certificate that was issued in error or on false information.
What the exam tests here. Matching the situation to the right tool and the right stage. Read the scenario for the trigger word: "covered", "unsafe", "disagrees", "move in".
Check yourself
Try the three questions at the end of this module before moving on.
Where to look in your own books
- IRC 2024 Chapter 1: R101, R102, R104, R105, R106, R109, R110, R112, R113, R114
- IRC 2024 Chapter 2: R202
- IRC 2024 Chapter 3: Table R301.2, Table R301.5, Tables R302.1(1) and R302.1(2), Table R302.6
- IRC 2024 Chapter 4: Table R401.4.1, the R403.1 footing tables, the R404.1 foundation wall tables
- IRC 2024 Chapter 6: Table R602.3(1), the R602.10 bracing tables
- IRC 2024 Chapters 5 and 8: the R502 and R802 span tables
- IRC 2024 Chapter 44 and the index