Fire Grading 3 : The process of performing specified fire resistance tests on various structural elements of a building and assigning a rating number according to the results
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}