What type of device must be equipped on self-locking doors leading to a roof or balcony?

The requirement for a sounding device on self-locking doors leading to a roof or balcony is rooted in safety protocols designed to prevent accidents and unauthorized access. A sounding device is intended to alert staff and residents when the door is opened, signaling that someone may be accessing a potentially dangerous area like a roof or balcony. This is crucial in assisted living environments where residents may be at risk due to mobility issues or cognitive impairments.

By implementing a sounding device, staff can respond quickly to any situation that arises, thereby enhancing the safety and security of the residents. Other types of devices like a security alarm, lighting system, or camera system have their functions but do not provide the immediate alert mechanism that a sounding device offers, which is essential in preventing accidents in these sensitive areas.