When must doors in smoke barriers be automatically closing?

Doors in smoke barriers must be automatically closing upon detection of smoke to ensure that the intended safety measures are immediately activated in the event of a fire. Smoke barriers are designed to contain smoke and prevent its spread throughout a building, helping to protect occupants and maintain tenable areas for escape.

The automatic closing feature activates when smoke is detected, ensuring that the barrier achieves its purpose effectively. This prompt action is critical as smoke can travel quickly and significantly hinder evacuation and put lives at risk.

While doors may be manually closed during an emergency situation or should ideally be closed at all times when not in use, the key regulation is that they automatically engage in response to smoke detection. This specific requirement is rooted in fire safety codes and standards, emphasizing proactive measures to enhance safety in situations where smoke is present.