Door Assembly : Any combination of a door, frame, hardware, and other accessories that is placed in an opening in a wall that is intended primarily for access or for human entrance or exit
NFPA 252 Standard Methods of Fire Tests of Door Assemblies, 2003 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=252, (Std: Meth of Fr Tst of Door Assly - Amer) {271 NFC}