In manufacturing operations involving the use of conveyor systems to transport material through fire separations, it may not be possible to use standard closure devices. NFPA 80, “Standard for Fire Doors and Other Opening Protectives”, includes appendix information concerning protection of openings through vertical fire separations. NFPA 13, “Standard for the Installation of Sprinkler Systems”, includes methods of protecting openings through floor assemblies, however, it is assumed by that standard that the remainder of the building would be sprinklered. Combinations of methods may be required to ensure that the level of safety inherent in the requirements of the Code is maintained.