CPI Building Code Requirements 2 — Questions and Answers
Question 1: Under the International Building Code, what is the minimum required width for a means of egress corridor serving an occupant load greater than 50?
- 36 inches
- 44 inches (Correct answer)
- 48 inches
- 60 inches
Correct answer: 44 inches
The IBC requires corridors serving an occupant load greater than 50 to be at least 44 inches wide.
Question 2: Which code section governs the minimum ceiling height in habitable rooms under the International Residential Code?
- R301
- R303
- R305 (Correct answer)
- R310
Correct answer: R305
IRC Section R305 establishes minimum ceiling height requirements, generally 7 feet for habitable rooms.
Question 3: A Type I-A construction building may have an unlimited floor area under the IBC when it is fully sprinklered. What is the primary reason for this allowance?
- Type I-A uses non-combustible materials and fire suppression reduces risk (Correct answer)
- Concrete walls provide adequate sound insulation
- The IBC exempts government buildings from area limits
- Fully sprinklered buildings do not require fire-rated assemblies
Correct answer: Type I-A uses non-combustible materials and fire suppression reduces risk
Type I-A construction uses non-combustible materials and automatic sprinklers significantly reduce fire spread risk, justifying unlimited area.
Question 4: When installing electrical panels in a residential garage, what minimum working clearance in front of the panel is required by the NEC?
- 18 inches
- 24 inches
- 30 inches (Correct answer)
- 36 inches
Correct answer: 30 inches
NEC 110.26 requires a minimum of 30 inches of clear working space width in front of electrical equipment.
Question 5: Under the IBC, which occupancy classification would apply to a building used as an elementary school?
- Assembly Group A-3
- Educational Group E (Correct answer)
- Institutional Group I-4
- Business Group B
Correct answer: Educational Group E
Buildings used for educational purposes for students through the 12th grade are classified as Educational Group E under the IBC.
Question 6: What does the term 'AHJ' stand for in the context of building codes and inspections?
- Approved Housing Jurisdiction
- Authority Having Jurisdiction (Correct answer)
- Accredited Housing Judge
- Assigned Housing Inspector
Correct answer: Authority Having Jurisdiction
AHJ stands for Authority Having Jurisdiction, the organization or official responsible for enforcing code requirements.
Question 7: According to the IBC, what is the maximum rise for a single step in a stairway?
- 6 inches
- 7 inches
- 7.75 inches (Correct answer)
- 8.25 inches
Correct answer: 7.75 inches
The IBC limits stair riser height to a maximum of 7.75 inches to ensure safe step geometry.
CPI Building Code Requirements 2
Under the International Building Code, what is the minimum required width for a means of egress corridor serving an occupant load greater than 50?