CLC Code Compliance & Permitting 3 — Questions and Answers
Question 1: According to the IRC, what is the minimum width of a habitable hallway?
- 28 inches
- 32 inches
- 36 inches (Correct answer)
- 42 inches
Correct answer: 36 inches
IRC R311.6 requires hallways serving habitable space to be at least 36 inches wide.
Question 2: When is a variance from code requirements typically granted?
- Automatically when the homeowner requests it
- When strict compliance creates undue hardship and the intent of the code is still met (Correct answer)
- Only for commercial projects over $500,000
- When the contractor prefers a different method
Correct answer: When strict compliance creates undue hardship and the intent of the code is still met
A variance is granted by the local zoning or appeals board when literal code enforcement would cause undue hardship without endangering public safety.
Question 3: Which code section governs egress window requirements in sleeping rooms?
- IRC R303
- IRC R310 (Correct answer)
- IRC R302
- IRC R315
Correct answer: IRC R310
IRC R310 specifies egress window requirements for sleeping rooms, including minimum opening area, height, width, and sill height.
Question 4: What does the term 'setback' refer to in local zoning codes?
- The required distance a structure must be from property lines (Correct answer)
- The minimum ceiling height in habitable rooms
- A penalty for late permit filing
- The depth of a footing below grade
Correct answer: The required distance a structure must be from property lines
Setbacks are zoning requirements specifying the minimum distance a structure must be located from property lines, streets, or other features.
Question 5: Under the IRC, smoke alarms in new construction must be interconnected so that when one sounds:
- An alert is sent to the fire department
- All alarms in the dwelling sound simultaneously (Correct answer)
- Only the nearest alarm activates
- A 60-second delay is triggered before full activation
Correct answer: All alarms in the dwelling sound simultaneously
IRC R314.4 requires smoke alarms in new construction to be interconnected so that activation of one causes all alarms in the home to sound.
Question 6: What is the primary reason a framing inspection is required before walls are closed in?
- To verify paint colors match the permit drawings
- To confirm structural framing, fire blocking, and rough-in work comply with code before concealment (Correct answer)
- To measure room square footage for tax assessment
- To approve the type of insulation to be installed
Correct answer: To confirm structural framing, fire blocking, and rough-in work comply with code before concealment
Framing inspections allow the inspector to verify structural, fire blocking, and rough-in work before it is permanently concealed by drywall.
Question 7: According to IRC, what is the maximum rise allowed for a single stair riser?
- 7 inches
- 7¾ inches (Correct answer)
- 8¼ inches
- 9 inches
Correct answer: 7¾ inches
IRC R311.7.5.1 limits individual stair risers to a maximum height of 7¾ inches.
CLC Code Compliance & Permitting 3
According to the IRC, what is the minimum width of a habitable hallway?