b'BUILDING CODEComplying with theCodeandaddressesuninsulatednentsandassemblies,including Building Code andconventionally-insulatedtheirconnections,thatseparate Part 3 buildings oftensystems.Nearertotheendofdissimilarenvironmentsorare are designed with flat orthis article, well briefly examineexposedtotheexterior,where low-slopedmembranewhat to do with liquid membranethese are:roofs,referredtoinsystems,ballastedsystemsanda)Subject to wind load, andwater-shedding systems.theRCABCRoofingb) Requiredtobedesignedto PracticesManualasYouwillrecallfromthe Waterproofing RoofSystems.third article in this series thatresist wind load.2) Exceptasprovidedinsentence ThistermrelatestotheSWLs calculated by the regis-functionoftheroofteredprofessionalskilledinthework(3),thewindloadreferredto ratherthantoitsslope;water-sheddingconcerned (Division B, Part 4) must bein sentence (1) shall be 100 per roofsystems, by contrast, are those thatused to design the actual roof assemblycentofthespecifiedwindload harness gravity to shed water from the(DivisionB,Part5,Environmentaldeterminedinaccordancewithbuilding,butdonotwaterproofit).Separation).TheCodeanchorsthoseArticle 4.1.7.1.Membrane roofs is a broad categoryrequirementsinPart5,Section5.2.,3) Where it can be shown by test orthat includes both sheet products andArticle5.2.2.2.,Determinationof Windanalysisthatamaterial,compo-hot- or cold-applied liquid membranes,Load,whichIhavereplicatedbelownent,assemblyorconnection and these are generally configured three(boldtextintheCodeindicatesnewreferred to in sentence (1) will be different ways: uninsulated, convention- materialintroducedintheCodesubject to less than 100 per cent of ally insulated or protected (the latter isin 2018): the specified wind load, the wind often called an inverted system, whichloadreferredtoinsentence(1) is secured with ballast. 5.2.2.2.Determination of wind loadshall not be less than the load determined by test or analysis.BecausetheBuildingCodelargely(See Note A-5.2.2.2.)isfocusedonsheetmembraneroofs,1) This article applies to the deter- 4) Except as provided in sentencethisarticleisfocusedonthespecificmination of wind load to be used(5), the wind uplift resistance of compliancepathwaysidentifiedinthein the design of materials, compo- membraneroofingassemblies Surrey | Burnaby | Parksville | Victoria | Duncan | Courtenay | Abbotsfordcgrs.cawww.rcabc.org l19'