Architecture Building Codes and Zoning 2 — Questions and Answers
Question 1: What is the minimum egress width per occupant load factor specified in the IBC for corridors?
- 0.15 inches per occupant
- 0.2 inches per occupant (Correct answer)
- 0.3 inches per occupant
- 0.5 inches per occupant
Correct answer: 0.2 inches per occupant
The IBC requires corridors to provide 0.2 inches of width per occupant for level egress components.
Question 2: A 'variance' in zoning allows an owner to:
- Change the zoning classification of a parcel
- Deviate from specific zoning requirements due to unique hardship (Correct answer)
- Override federal environmental regulations
- Split a parcel into smaller lots
Correct answer: Deviate from specific zoning requirements due to unique hardship
A variance grants relief from specific dimensional or use requirements when strict application would cause undue hardship due to unique property conditions.
Question 3: Which IBC construction type allows the tallest allowable building heights for most occupancies?
- Type V-A
- Type III-B
- Type I-A (Correct answer)
- Type II-B
Correct answer: Type I-A
Type I-A (protected noncombustible) has the highest fire-resistance ratings and therefore permits the greatest building heights and areas.
Question 4: What is the purpose of a 'fire-resistance rating' for building assemblies?
- To certify that materials are fireproof indefinitely
- To indicate how many hours an assembly can contain fire under standard test conditions (Correct answer)
- To measure smoke toxicity of building materials
- To rate the aesthetic finish quality of fireplace surrounds
Correct answer: To indicate how many hours an assembly can contain fire under standard test conditions
A fire-resistance rating specifies the duration in hours that an assembly can withstand standard fire exposure while maintaining structural integrity and limiting heat transmission.
Question 5: Under the ADA and IBC, what is the minimum clear width required for a standard accessible doorway?
- 28 inches
- 32 inches (Correct answer)
- 34 inches
- 36 inches
Correct answer: 32 inches
The ADA Standards require a minimum 32-inch clear opening width for accessible doors, measured from the face of the door to the door stop.
Question 6: Which zoning tool allows higher-density development in exchange for public amenities such as plazas or affordable housing?
- Downzoning
- Bonus density / incentive zoning (Correct answer)
- Cluster zoning
- Interim zoning
Correct answer: Bonus density / incentive zoning
Incentive zoning grants developers additional floor area or height in exchange for providing specified public benefits.
Architecture Building Codes and Zoning 2
What is the minimum egress width per occupant load factor specified in the IBC for corridors?