Designation:F924−90(Reapproved2015)StandardTestMethodforResistancetoPunctureofCushionedResilientFloorCoverings1ThisstandardisissuedunderthefixeddesignationF924;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthelaboratoryprocedurefordeterminingtheresistanceofcushionedresilientfloorcover-ingstopuncturesfromdroppedpointedobjectssuchasdinnerforks.1.2Thistestmethodemploysa35-gcylindricaldartwithaflat,small-diametertipthatisdroppedontoaspecimenofflooring.Thedartrepresentstheweightofatypicalforkandthetipproducesasimilarpuncturetothosewhichresultfromdroppedforks.1.3Flooringwiththickwearlayersmaynotpunctureundereventhemostseveredrop.Althoughdatacanbeobtainedbyincreasingthedropheightortheweightofthedart,valuesofthismagnitudehavenopracticalapplication.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityandregulatorylimitationspriortouse.Forspecificprecautionstatementsee8.2.2.ReferencedDocuments2.1ASTMStandards:2E171PracticeforConditioningandTestingFlexibleBarrierPackagingF141TerminologyRelatingtoResilientFloorCoveringsF410TestMethodforWearLayerThicknessofResilientFloorCoveringsbyOpticalMeasurement3.Terminology3.1Definitions:3.1.1Fordefinitionsofothertermsusedinthistestmethod,refertoTerminologyF141.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1puncture—abreakinthewearlayerofthespecimen.Anindentationatthepointofimpactshallbeconsideredapunctureonlyifthewearlayerisbrokencompletelythroughatsome...
