Which occupancy requires both a manual fire alarm system and an automatic smoke detection system?

The occupancy that requires both a manual fire alarm system and an automatic smoke detection system is typically categorized as Group I-3. This classification includes institutional facilities, such as correctional centers and facilities for individuals with disabilities, where the occupants may have limited ability to respond to emergencies.

In these environments, the combination of a manual fire alarm system and an automatic smoke detection system is crucial for ensuring safety. The manual system allows staff to initiate an alarm in case of a fire, while the automatic smoke detection system provides an early warning, essential in a setting where occupants might not be able to evacuate easily or quickly.

The other occupancy categories mentioned may not have the same stringent requirements for both systems. For example, Group F is associated with factory and industrial environments, which may have different regulations based on the specific activities and hazards present. Similarly, Group I and Group R have distinct requirements related to healthcare, residential, and lodging situations that do not always mandate both types of systems in the same way as Group I-3 does. Thus, the requirement for both systems in Group I-3 is critical for protecting vulnerable populations in potentially difficult evacuation scenarios.