Fire Resistance 09 : Disaster Management. Resistance to burning; a rating system which indicates how long a material or structure can resist the effects of fire
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}