Fire Resistance Level (FRL) : The fireresistance grading periods in minutes, determined for: (1) structural adequacy; (2) integrity; and (3) insulation, expressed in that order, ie. FRL XX, YY, ZZ
Peter Koob (Compiler & Typesetter, Tasmania State Emergency Service), Emergency Management Australia (Ed & Pub), Australian Emergency Management Glossary (Australian Emergency Manuals Series Part I: The Fundamentals, Manual 3), ISBN0642476152, Tasmania, Australian 1998. http://www.em.gov.au/Documents/Manual03-AEMGlossar y.PDF, (Emr Mgt/ ND and Other Dzstr - Brit) {53}