What is the maximum length of dead-end corridors in new mercantile occupancies protected by a supervised automatic sprinkler system?

What is the maximum length of dead-end corridors in new mercantile occupancies protected by a supervised automatic sprinkler system?
A . 20 ft (6 m)
B . 50 ft (15 m)
C . 75 ft (23 m)
D . 100 ft (30 m)

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Answer: C

Explanation:

Dead-end corridors are portions of a hallway that do not lead to an exit, posing challenges for occupant evacuation during a fire. According to NFPA 101®, Life Safety Code®, Section 36.2.5.2 (New Mercantile Occupancies):

In buildings equipped with a supervised automatic sprinkler system, the maximum allowable length of a dead-end corridor is 75 feet (23 meters).

Without a sprinkler system, the limit is typically much shorter, such as 20 feet (6 meters) or 50 feet (15 meters) depending on occupancy type.

20 ft (A) and 50 ft (B): These limits apply to unsprinklered or higher-risk occupancies. 100 ft (D): This exceeds the allowable limit, even with sprinklers.

Reference: NFPA 101, Section 36.2.5.2: Dead-end corridor limits for mercantile occupancies