"In Coffee Break Training FP-2013-31 , we described the importance of reading building and fire codes with an eye on detail; specifically, always read the footnotes to any table that is published in the book. The illustration is a perfect example, showing how a quick review of a model building code may lead to misinterpretation and misapplication. The illustration is a noncombustible, assembly type (Group A) occupancy used as an aircraft museum. It is large enough to require that the building have a minimum one-hour fire resistance rating. This would be interpreted in National Fire Protection Association (NFPA) 5000, 'Building Construction and Safety Code' as Type II 111 construction, and in the 'International Building Code', it would be labeled Type IIA construction."
Coffee Break Training - Fire Protection Series No. FP-2014-38
United States Fire Administration: http://www.usfa.fema.gov/