CSLB General Building (B)Mechanical, Electrical, Plumbing CoordinationEasy
According to the California Residential Code, fire blocking is required vertically in concealed stud wall spaces at a maximum interval of how many feet?
- A10 feet
- B8 feet
- C12 feet
- D6 feet
Show answer & explanationAnswer & explanation
Correct answer: A. 10 feet
The CRC requires fire blocking in concealed spaces of stud walls at a maximum vertical interval of 10 feet to prevent fire from traveling unchecked through tall wall cavities.
Why the other options are wrong
- B. 8 feet is not the standard code requirement.
- C. 12 feet exceeds the maximum allowed interval.
- D. 6 feet is too frequent and not the code-specified interval.
Vertical Fire Blocking Interval
Fire blocking must be installed at a maximum vertical spacing of 10 feet within concealed stud wall cavities.
- Applies to concealed spaces of stud walls and partitions
- Also required at floor and ceiling levels
- Prevents chimney-effect fire spread in tall walls
Memory trick: Ten feet tall, block the wall.