Designation:D3500−20StandardTestMethodsforWoodStructuralPanelsinTension1ThisstandardisissuedunderthefixeddesignationD3500;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thesetestmethodscoverthedeterminationofthetensilepropertiesofwoodstructuralpanels.1.2Woodstructuralpanelsinuseincludeplywood,orientedstrandboardandcompositesofveneer,andotherwood-basedlayers.1.3TestMethodA,TensileTestforSmallSpecimens:1.3.1Thistestmethodemployssmallspecimensthatshouldhaveareducedcrosssectionatthecenteroftheirlengthtoavoidfailureinthegriparea.Thetransitionfromfullwidthofspecimentoreducedsectionatthecentershouldbegradualtominimizestressconcentration.1.3.2Whenthemeasurementsofelasticpropertiesaretobemade,thelengthofthereducedcrosssectionatthecentershouldbeofsufficientlengthtoaccommodateanextensometer.1.4TestMethodB,TensileTestforLargeSpecimens:1.4.1Thistestmethodemployslargespecimensandre-spondswelltomanufacturingvariables,panelgradecharacteristics,andothervariablesinfluencingthetensilepropertiesofstructuralpanels.1.4.2Thetestspecimensarelargeenoughtocontainthemaximumsizedgradecharacteristicsfoundinpanels.Thetestspecimenshaveaconstantcrosssectionsincethesizeandlocationofgradecharacteristicscontrolthelocationoffailuresandtheeffectofstressconcentrationatthegripsisovershad-owed.1.4.3Thistestmethodisrecommendedforthefollowing:1.4.3.1Comparativetestsofwoodstructuralpanels,1.4.3.2Determiningtheinfluenceofanyspecificstrengthreducingvariablesonthetensilepropertiesofwoodstructuralpanels,1.4.3.3Determinationoftensilepropertiesofpanelsforuseindevelopingstructuralrecommendations.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatarep...
