Understanding the UL Fire Resistance Directories - Ron Blank ...

NUMBERING SYSTEM FOR FIRE RATED ASSEMBLIESTYPES OF PROTECTIONMembrane ProtectionNumbering System for Fire RatedAssemblies – Types of ProtectionUnderstanding ULDirect AppliedProtectionUnprotectedGroups of Construction 000-099 100-199 200-299 300-399 400-499 500-599 600-699 700-899 900-999Floors-Ceilings A,B*,or C*Concrete and CellularSteel FloorD, E*orF*Concrete and Steel FloorUnitsG, H*, or I*Concrete and Steel JoistsConcealedGrid Sys.ConcealedGrid Sys.ConcealedGrid Sys.(Reserved)(Reserved)(Reserved)Exposed GridSystemExposed GridSystemExposed GridSystem(Reserved)(Reserved)(Reserved)Metal LathMetal LathMetal LathGypsumBoardGypsumBoardGypsumBoardMisc. SFRM + UnprotectedMasticCoatingSFRM +UnprotectedMisc. SFRM + UnprotectedJ or KConcreteConcealedGrid Sys.(Reserved)Exposed GridSystem(Reserved)Metal LathGypsumBoardMisc. SFRM + UnprotectedL or M* Wood Joist orCombination Wood andSteel AssembliesBeams:N or O* for Floor-CeilingRoof-Ceiling:P, Q* or R*Beams:S or T* Roof-CeilingWall & Partition:U, V or W*Columns: X, Y or Z*ConcealedExposed GridGypsum(Reserved)(Reserved) Metal LathGrid Sys. System BoardConcealedGrid Sys.ConcealedGrid Sys.BuildingUnits(Reserved)(Reserved)(Reserved)Bldg. orPartition (Reserved)Panel UnitsBuildingUnitsPrefabricatedExposed GridSystemExposed GridSystemExposed GridSystemInsulatingConcrete(Reserved)Batts &Blankets orMineral andFiber Boards(Reserved)(Reserved)Metal LathMetal LathMetal LathGypsumBoardGypsumBoardGypsumBoardMisc. SFRM + UnprotectedMasticCoating SFRM + UnprotectedMisc.MasticCoatingWood StudMetal StudMetal PanelsGypsum Bd. Gypsum Bd.Gypsum Bd.Misc.Lath and/or Lath and/orLath and/orPlaster PlasterPlasterBatts &Blankets or Metal Lath & Gypsum MasticMineral & Plaster Board CoatingFiber BoardsSFRM +SFRM +SFRM +SFRM +UnprotectedUnprotectedMasonryReserved)The prefix numbers with an asterisk (*) and the design numbers indicated as "Reserved" in theabove table are for future expansion and to cater to new types of systems