Fire door
A fire door is a door with a fire-resistance rating (sometimes referred to as a fire protection rating for closures) used as part of a passive fire protection system to reduce the spread of fire and smoke between separate compartments of a structure and to enable safe egress from a building or structure or ship. A fire door, along with any fire dampers, may also be referred to as a closure. Records of fire doors and their maintenance may be held in a fire door register.