Designation:D3161/D3161M−20StandardTestMethodforWindResistanceofSteepSlopeRoofingProducts(Fan-InducedMethod)1ThisstandardisissuedunderthefixeddesignationD3161/D3161M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoverstheprocedureforevaluatingthewindresistanceofmanydiscontinuous,airpermeable,steepsloperoofingproductsthatresultsfromtheproduct’srigidity,withorwithoutcontributionfromsealanttohelpholddowntheleadingedgeofthetabs,ormechanicalinterlocking,withorwithoutcontributionfromsealanttohelpholddowntheleadingedgeofthetabs,oranycombinationthereof.Theproductsareappliedtoatestpanelinaccordancewiththemanufacturer’sinstructionsandtestedata2:12(17%)slope,oratthelowestslopepermittedbythoseinstructions.1.2Thismethodevaluateswindresistanceusingafan-inducedprocedure,deliveringastreamofairacrosstheexposedsurfaceofthetestspecimens.Thismethoddoesnotmeasurestructuralperformance,anddoesnotprovideamea-sureofupliftresistance.Consequently,thismethodisnotapplicabletocontinuous,non-permeableroofsystemsorcov-erings(suchasmembranesormechanicallyseamedmetalroofpanels).1.3Thistestmethodwasformerlytitled“WindResistanceofAsphaltShingles(Fan-InducedMethod)”butwasrevisedtoacknowledgethatthemethodisapplicabletomanyothersteepsloperoofingproductsandhasbeenusedtoevaluatethewindresistanceofthoseproductsformanyyearsbyseveraltestingandcertificationlaboratories.Steepsloperoofingproductsthatfallunderthescopeofthistestmethod,inadditiontoasphaltshingles,arepolymer-basedshingles,fiber-cementshingles,concretetiles,claytiles,metalshingles,andphotovoltaicshingles.1.4Thistestmethodislimitedtosteepsloperoofingproductappliedwithamaximumexposureof410mm[16in.].1.5ThevaluesstatedineitherSIunitsorinch-pound...
