In the sprinklered elevator hoistway, heat detectors are required within how many inches of each sprinkler?

In the sprinklered elevator hoistway, heat detectors are required within how many inches of each sprinkler?

• A. 18 inches
• B. 24 inches
• C. 12 inches
• D. 6 inches

Answer: (B)

In sprinklered elevator hoistways, the goal is to catch heat near a sprinkler quickly so the fire alarm and elevator recall actions happen without delay. Placing heat detectors within 24 inches of each sprinkler ensures that any heat in the immediate sprinkler area will be detected promptly, even as the sprinkler head responds to the fire. The 24-inch distance is the maximum allowed, meaning detectors can be closer, but must not be farther than 24 inches from any sprinkler head. This proximity helps coordinate detection with sprinkler activation, improving safety for occupants and enabling a faster, controlled response in the hoistway.

In sprinklered elevator hoistways, the goal is to catch heat near a sprinkler quickly so the fire alarm and elevator recall actions happen without delay. Placing heat detectors within 24 inches of each sprinkler ensures that any heat in the immediate sprinkler area will be detected promptly, even as the sprinkler head responds to the fire. The 24-inch distance is the maximum allowed, meaning detectors can be closer, but must not be farther than 24 inches from any sprinkler head. This proximity helps coordinate detection with sprinkler activation, improving safety for occupants and enabling a faster, controlled response in the hoistway.