A fire rated 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 seperate compartments of a structure and to ebable safe agress from a building or structure or ship.
In Europe national standards, there is a new standard of EN1634 which refers to fire doors as fire-resisting door sets.
In the United Kingdom, a fire resisting doorset should be subjected to either a British Standard Fire Test BS476 Part 22 1987, or a BS/EN 1634-1 2000 test.
In the North America, all of the components of the fire door assembly must bear a listing agencies label( meet the basic build requirements of ANSI and NFPA) to ensure the components have been tested to meet the fire rating requirements. The doors testing standard is made by UL( Underwriters Laboratories Inc.) including UL 10(C), UL 10(B).