b'FIRE RATINGSASTM E84: Standard Test MethodCharacteristics ofBuilding Materials FIRE-RESISTANCE RATING /for Surface Burning Characteristics of and Assemblies; ROOF FIRE CLASSIFICATION Building Materials; CAN/ULC-S102.2: StandardInthediscussionaroundtheappro- ASTM E119: Standard Test Methods Method ofTest for Surface Burningpriate materials to be used in the roofing for Fire Tests ofBuilding ConstructionCharacteristics ofFlooring, Floorassembly,therearetwocharacteristics and Materials; Coverings, and Miscellaneous Materials that are often confused for one another. ASTM E136: Standard Test Methodand Assemblies; Those two characteristics are the fire-re- for Assessing Combustibility ofMaterialsCAN/ULC-S107: Standard Methodssistance rating of the roof and the roofUsing a Vertical Tube Furnace for Fire Tests ofRoofCoverings; and fire classification. Earlier in the article, at 750C; CAN/ULC-S114: Standardwe mentioned and briefly explained theASTM E662: Standard Test MethodMethod ofTest for Determinationfire-resistance rating of an assembly butfor Specific Optical Density ofSmokeofNon-Combustibility inwithout focusing on the roof assembly Generated by Solid Materials; and Building Materials. or how it is determined. ASTM E2652: Standard Test Methodfor Measuring the Heat Release Rate ofLow-Flammability Materials Using an Oxygen Consumption Calorimeter.Thesestandardsandtheirresults are often displayed on a product mate-rial data sheet (especially if the product is from the U.S.), which could lead to afalseconfidenceintherequirement beingmet,sospecifiersshouldask for Canadian product data sheets. The subtle differences in test apparatus and methodologybetweenthestandards, with the CAN/ULC being more restric-tive, can result in a difference in rating. A roof assembly might be classified by ASTME119asachievingafire-resis-tance rating of one hour to its test condi-tions,whereasCAN/ULC-S101may determinethattheassemblyachieves less than an hour to its test conditions.It is important to note that, in some instances,ASTMstandardsarerefer-enced by the NBC or BCBC, or they may be determined to be acceptable by amunicipalityforaparticularproject application,butthoseinstancesare outsidethescopeofthisarticle.For amajorityofapplications,theCAN/ULCstandardsshouldbeconsidered first for code compliance. The CAN/ULC standards that pertain to fire or fireresistanceareextensiveandtooTRS BUILDING numeroustolistandexplainallofENVELOPE CORP.them here, but below is a non-exhaus-tive list of common standards relating to roofing: TOMTAR ROOFINGCAN/ULC-S101: Standard Method& SHEET METAL LTD. ofFire Endurance Tests ofBuildingUnmatched Industry Experience.Construction Materials;CAN/ULC-S102: Standard Serving the Interior & Western CanadaMethod ofTest for Surface Burning www.rcabc.orgl19'