A fire door in high risk industries, e.g. the onshore/offshore oil and gas industry, is a significant safety feature of the structure. It provided a sufficient barrier to prevent or delay the spread of fire and smoke while allowing people to evacuate. Especially in the offshore oil and gas industry and offshore wind industry this is of lifesaving importance since emergency services need more time to get to these sites.
Some environments can be very tough on doors. Fire rated doors might get damaged in the long run by the passing of people, which is inevitable. The smallest deficiencies or cracks can compromise the operability and fire safety characteristics of the fire door, therefore, such doors are in need of regular maintenance in order to ensure day-to-day operability and safety.