A rolling fire door has to close on its own
Most of the time a rolling fire door sits coiled up out of sight above an opening. It has one job: when there's a fire, it has to come down and close that opening completely, with nobody touching it.
That automatic closing is triggered by a fusible link that melts at a set temperature or by a signal from the building's fire alarm system. A governor controls the door's speed on the way down so it closes steadily instead of slamming.
The trouble is that a door that sits open for years can quietly stop working. Links get painted over, guides get bent, springs lose tension and storage creeps into the path of the door. Annual testing is how you find that out before a fire does.
Some openings use fire-rated counter shutters instead of full-size doors, at a kitchen pass-through or a service window between rooms. They close the same way and need the same yearly attention.





