Most fire doors should be kept closed at all times, however some are designed to stay open under normal circumstances, and closing automatically in the event of a fire.
Some doors are designed to stay open under normal circumstances, and close automatically in the event of a fire. Most fire doors are designed to be kept closed at all times.
Most fire doors are designed to be kept closed at all times. Some doors are designed to stay open under normal circumstances, and close automatically in the event of a fire.
Most fire doors are designed to be kept closed at all times. Some doors are designed to stay open under normal circumstances, and close automatically in the event of a fire.