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NFPA CFI-I Exam - Topic 2 Question 20 Discussion
Topic #: 2
What is the minimum fire protection rating for a fire door in a 2-hour fire resistance-rated assembly that protects a refuse chute?
Fire doors in fire resistance-rated assemblies must have a fire protection rating proportionate to the rating of the assembly they protect. According to NFPA 80, Standard for Fire Doors and Other Opening Protectives, and NFPA 101, Life Safety Code:
For a 2-hour fire resistance-rated assembly, the fire door protecting an opening (like a refuse chute) must have a minimum fire protection rating of 1 hours (90 minutes).
The reduced rating for the door (relative to the wall) is allowed because doors are tested to prevent fire spread through openings for their specified rating period.
hour (A) and 1 hour (B) are insufficient for a 2-hour assembly.
2 hours (D) exceeds the requirement but is unnecessary unless specified for high-risk openings.
NFPA 80, Table 4.2.1.1: Fire door ratings based on fire resistance-rated assemblies.
NFPA 101, Section 8.3.4.2: Fire door requirements for vertical openings like refuse chutes
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