B1 · area 05 · subtopic 0505

Fireblocking

2 percent of the B1 Residential Building Inspector exam. At 60 questions, that is roughly 1 to 2 questions, each with about 120 seconds of budget including the lookup.

Exam: B1
Area: Wall Construction and Coverings
Weight: 2%
Questions: ~1 to 2

What this subtopic covers

Fireblocking provided where required in concealed vertical spaces.

Paraphrased from the certification content outline published by the International Code Council for the B1 exam. This page cites no code sections and reproduces no code text: your code book carries the requirements, and the skill this site trains is finding them fast.

How to drill it

Find the chapter of the International Residential Code that carries this subject and read it once for structure, not retention: what lives here, what gets sent elsewhere, which tables exist.
Write your own plain-language phrases for what this subtopic covers, then note the code's terms beside them. Mismatches between the two columns are exactly where exam questions cost you time.
Run timed lookups: pick a requirement named in the descriptor above, start a stopwatch, find the governing text in your book, stop. Log the seconds. Past two minutes is a miss even when the answer is right.
Weight your reps to the number above. Roughly 1 to 2 questions means this subtopic needs a handful of confident reps, not a week.

2024 International Residential CodeThe book that sits on the table for two hours. Match it to the version you register for.Check price

Translation trap on this subtopic

blocking in a stud cavity: the code files this as fireblocking. Concealed draft openings are a fire topic, not a framing topic. Wall construction carries 27 percent of B1, the largest single area.

Nearby traps in area 05

shear walls / wall bracing is filed under braced wall panels, subtopic 0509.

house wrap is filed under exterior sheathing, veneers, and weather-resistant coverings, subtopic 0512.

The rest of area 05: Wall Construction and Coverings (27%)

Subtopic		Weight
0501	Lumber Quality, Walls	4%
0502	Wood Framing, Walls	4%
0503	Header Spans	2%
0504	Steel Framing	2%
0506	Masonry Materials and Placement	2%
0508	Concrete Wall Inspection	2%
0509	Braced Wall Panels	2%
0510	Interior Coverings	2%
0512	Exterior Sheathing, Veneers, and Weather-Resistant Coverings	3%
0513	Exterior Plaster, Stucco, and Lath	2%

Drill the translation layer free Full B1 breakdown

The kit that goes on the table

2024 IRCThe book itself

2021 IRCIf you register on 2021

2024 Fast-TabsPlace them yourself

Construction Master ProFeet-inch math, no errors

Match the book and tabs to the edition you register for.Confirm which, first.

The 120-second study sheet

One page: every topic weight on all four residential exams, the plain-language to code-language glossary, and the two-week study sequence. Free, straight to your inbox.

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