How frequently should an operator check the elevator shaft for smoke when operating in Phase 2?

In Phase 2 of elevator operation, which is typically used by firefighters when responding to a fire emergency, regular monitoring of the elevator shaft for smoke is crucial. The reasoning behind checking the elevator shaft every 5 floors helps maintain an effective safety protocol while ensuring that firefighters can quickly assess the situation and make informed decisions about the use of the elevator.

Checking every 5 floors strikes a balance between safety and efficiency, allowing firefighters to monitor potential smoke or fire hazards without having to stop frequently. Smoke can rapidly spread through vertical shafts, and by checking at this interval, operators can identify unsafe conditions that may have developed. This practice reflects a proactive approach to safety and operational effectiveness in a firefighting context, ensuring that crews can maintain situational awareness as they work to manage the emergency.