Area Classifications : Critical Rescue and Fire-Fighting Access Area (CRFFAA): The rectangular area surrounding any runway within which most aircraft accidents can be expected to occur on airports
NFPA 403 Standard for Aircraft Rescue and Fire-Fighting Services at Airports, 2009 ed. http://www.nfpa.org/assets/files/aboutthecodes/403 /403-a2013-rop.pdf, (Std: Aircraft Rsq and Fr Fight Srvc at Airpt - Amer) {302 NFC}