Definitions for "Fire door"
Keywords:  door, shovelledk, nfpa, spread, resist
n. a door constructed to provide a specific degree of fire protection
Doors that building codes and the NFPA classify according to a rating system related to their fire resistance, such as 3-hour, 1 1/2-hour, 1-hour, etc.
A door or shutter, provided for the passage of persons, air or objects, which together with its frame and furniture as installed in a building, is intended, when closed, to resist the passage of fire and/or gaseous products of combustion, and is capable of meeting specified performance criteria to those ends. (BS 5599-11 and AD B)