CFB Building Codes & Standards 3 — Questions and Answers
Question 1: According to the IBC, a building's 'occupancy classification' is primarily determined by:
- The number of stories
- The intended use of the space (Correct answer)
- The square footage of the structure
- The type of construction materials used
Correct answer: The intended use of the space
Occupancy classification under the IBC is based on the intended use or character of occupancy of a building or space.
Question 2: What is the maximum stair riser height permitted by the IRC for residential stairs?
- 6.5 inches
- 7 inches
- 7.75 inches (Correct answer)
- 8.25 inches
Correct answer: 7.75 inches
The IRC limits residential stair riser height to a maximum of 7-3/4 inches (7.75 inches) to ensure safe step height.
Question 3: Which standard defines fire-resistance ratings for building assemblies through standardized testing?
- ASTM E84
- ASTM E119 (Correct answer)
- ANSI A117.1
- UL 217
Correct answer: ASTM E119
ASTM E119 is the standard test method for fire tests of building construction and materials, used to determine fire-resistance ratings.
Question 4: Under IBC Table 601, Type V-B construction allows wood framing with what fire-resistance rating for exterior bearing walls?
- 0 hours (Correct answer)
- 1 hour
- 2 hours
- 3 hours
Correct answer: 0 hours
IBC Type V-B (unprotected) construction requires 0-hour fire-resistance ratings for all structural elements including exterior bearing walls.
Question 5: A CFB must verify anchor bolt placement before a slab pour. What is the minimum embedment depth for a standard 1/2-inch anchor bolt per the IRC?
- 4 inches
- 7 inches (Correct answer)
- 10 inches
- 12 inches
Correct answer: 7 inches
The IRC requires a minimum embedment of 7 inches for anchor bolts connecting sill plates to concrete or masonry foundations.
Question 6: Which document would a field builder reference to verify that a specific product meets code-approved performance standards?
- Job site safety plan
- ICC Evaluation Service (ICC-ES) report (Correct answer)
- OSHA Form 300
- Builder's warranty document
Correct answer: ICC Evaluation Service (ICC-ES) report
ICC-ES reports (Evaluation Reports) confirm that a product or system meets the requirements of the IBC, IRC, or other model codes.
Question 7: Penetrations through a fire-rated floor/ceiling assembly must be protected using which method?
- Standard caulk sealant
- Listed firestop system (Correct answer)
- Metal collar only
- Gypsum board patch
Correct answer: Listed firestop system
All penetrations through fire-rated assemblies must be protected with a listed and labeled firestop system tested to maintain the assembly's fire-resistance rating.
CFB Building Codes & Standards 3
According to the IBC, a building's 'occupancy classification' is primarily determined by: