Commercial Building Inspector B2Wall Construction and Wall CoveringsHard
An inspector is checking the installation of a fire door assembly in a 1-hour fire-resistance-rated corridor wall. The door is a single-panel, swinging fire door. What is the minimum hourly fire protection rating required for this fire door assembly?
- A45 minutes
- B1 hour
- C20 minutes
- D30 minutes
Show answer & explanationAnswer & explanation
Correct answer: A. 45 minutes
According to IBC Table 716.1.1(1), for openings in 1-hour fire-resistance-rated corridor walls, the minimum required fire protection rating for a fire door assembly is 45 minutes.
Why the other options are wrong
- B. 1 hour would match the wall rating but is not the minimum required for a corridor wall in this scenario; 45 minutes is permissible.
- C. 20 minutes is typically for smoke barrier doors or specific room doors, not 1-hour rated corridor walls.
- D. 30 minutes is not a standard fire door rating for 1-hour rated corridor walls.
Fire Door Rating (Corridor Wall)
Fire door assemblies in fire-resistance-rated corridor walls have specific fire protection ratings, which are often less than the wall's rating, but sufficient to maintain compartmentalization and egress.
- Ratings are found in IBC Table 716.1.1(1).
- Corridor doors often have lower ratings than the wall.
- Ensures safe passage during a fire.
Memory trick: Door's Defense: Corridor's Crucial Code.