During a non-fire emergency, what must happen to all elevators not designated for emergency use?

During a non-fire emergency, elevators that are not designated for emergency use must be recalled to the lobby level to ensure the safety and efficiency of emergency operations. This procedure is essential because it prevents untrained individuals from using the elevators, which could lead to potential hazards or complications during an emergency response. By recalling the elevators to the lobby, emergency personnel can ensure that the elevators are used only for transporting emergency responders and equipment where needed, thus maintaining control over the situation and minimizing risks.

The option of keeping the elevators operational would pose increased dangers if they were used inappropriately by civilians. Locking the elevators down outright might make them inaccessible to those who may need them, including emergency service personnel. Shutting them down completely would render them unavailable for any emergency use, thus hindering response efforts. Therefore, recalling elevators to the lobby strikes a suitable balance between ensuring they are available for emergency use and protecting the public from potential dangers during non-fire emergencies.