What is essential for keeping elevator doors secure during emergency situations?

Keeping elevator doors secure during emergency situations is crucial for ensuring safety. Fire hooks are tools specifically designed to secure elevator doors, especially in the event of fire or other emergencies. These hooks can latch onto the door, preventing it from opening unexpectedly, which could potentially expose passengers to danger when exiting the elevator.

Installing fire hooks helps ensure that even when there is an emergency, the elevator doors will remain closed unless it's safe to open them. They are often part of the fire safety regulations in elevators, particularly in buildings where fire codes require additional safety measures to protect occupants.

Other options, while relevant to safety and operation, do not directly secure elevator doors. Smoke detectors alert occupants to smoke or fire but do not physically secure doors. Weight sensors are designed to prevent the elevator from moving if it is overloaded but do not address the security of the doors in emergencies. Backup power can keep the elevator functioning during power outages, but it does not secure the doors themselves during emergencies.