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1、Designation:D4956?13StardSpecificationfRetreflectiveSheetingfTrafficControl1ThisstardisissuedunderthefixeddesignationD4956thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevisionthey

2、earoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.ThisstardhasbeenapprovedfusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Th

3、isspecificationcoversflexiblenonexposedglassbeadlensmicroprismaticretreflectivesheetingdesignedfuseontrafficcontrolsignsdelineatsbarricadesotherdevices.1.2Thevaluesstatedininchpoundunitsaretoberegardedasstard.Thevaluesgi

4、veninparenthesesaremathematicalconversionstoSIunitsthatareprovidedfinfmationonlyarenotconsideredstard.1.3ThefollowingsafetyhazardscaveatpertainsonlytothetestmethodsptionSection7ofthisspecification.Thisstarddoesnotpurptto

5、addressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1AS

6、TMStards:2B209SpecificationfAluminumAluminumAlloySheetPlateB209MSpecificationfAluminumAluminumAlloySheetPlate(Metric)B449SpecificationfChromatesonAluminumE284TerminologyofAppearanceE308PracticefComputingtheColsofObjectsb

7、yUsingtheCIESystemE808PracticefDescribingRetreflectionE810TestMethodfCoefficientofRetreflectionofRetreflectiveSheetingUtilizingtheCoplanarGeometryE811PracticefMeasuringColimetricacteristicsofRetreflectsUnderNighttimeCond

8、itionsE991PracticefColMeasurementofFluescentSpecimensUsingtheOneMonochromatMethodE1164PracticefObtainingSpectrometricDatafObjectColEvaluationE1247PracticefDetectingFluescenceinObjectColSpecimensbySpectrophotometryE1347Te

9、stMethodfColColDifferenceMeasurementbyTristimulusColimetryE1349TestMethodfReflectanceFactColbySpectrophotometryUsingBidirectional(45:00:45)GeometryE2152PracticefComputingtheColsofFluescentObjectsfromBispectralPhotometric

10、DataE2153PracticefObtainingBispectralPhotometricDatafEvaluationofFluescentColE2301TestMethodfDaytimeColimetricPropertiesofFluescentRetreflectiveSheetingMarkingMaterialsfHighVisibilityTrafficControlPersonalSafetyApplicati

11、onsUsing45:NmalGeometryG7PracticefAtmosphericEnvironmentalExposureTestingofNonmetallicMaterialsG113TerminologyRelatingtoNaturalArtificialWeatheringTestsofNonmetallicMaterialsG147PracticefConditioningHlingofNonmetallicMat

12、erialsfNaturalArtificialWeatheringTestsG151PracticefExposingNonmetallicMaterialsinAcceleratedTestDevicesthatUseLabatyLightSourcesG155PracticefOperatingXenonArcLightApparatusfExposureofNonMetallicMaterials2.2OtherStardsIS

13、O48922:2006PlasticsMethodsofexposuretolabatylightsourcesPart2:XenonarclampsISO48922:2006Amd.1:2009PlasticsMethodsofexposuretolabatylightsourcesPart2:XenonarclampsEN128991:2007FixedverticalroadtrafficsignsPart1:Fixedsigns

14、3.Terminology3.1Definitions—DefinitionsoftermsareasdescribedinTerminologyE284PracticeE808TerminologyG113.3.2DefinitionsofTermsSpecifictoThisStard:1ThisspecificationisunderthejurisdictionofASTMCommitteeD04onRoadPavingMate

15、rialsisthedirectresponsibilityofSubcommitteeD04.38onHighwayTrafficControlMaterials.CurrenteditionapprovedDec.152013.PublishedJanuary2014.iginallyapprovedin1989.Lastpreviouseditionapprovedin2011asD4956–11a.DOI:10.1520D495

16、613.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.Copyright?ASTMInternational100BarrHarbDrivePO

17、BoxC700WestConshohockenPA194282959.UnitedStates14.3.5Class5—Thisshallbeanonadhesivebackingmadeofmaterialcommerciallyusedfselfsupptingproductssuchastrafficconecollarstemparyrollupwarningsignspostbs.5.deringInfmation5.1The

18、purchaserusingthisspecificationshallincludethefollowinginfmation:5.1.1ASTMdesignation(D4956)5.1.2Classificationtype(seeSection4)5.1.3Adhesiveclass(see4.3)5.1.4Daytimecol(see6.3)5.1.5Lengthwidthofsheets(see8.1)5.1.6Length

19、widthofrolls(see8.2)5.1.7Supplementaryinfmationifrequiredbythepurchaserincluding:5.1.7.1Compliancewiththeminimumcoefficientofretreflectionf0.1observationangleisasupplementaryrequirementwhichshallapplyonlywhenspecified.An

20、observationangleof0.1maybespecifiedwherethelongdistanceperfmanceofasheetingistobearequirement5.1.7.2Fungusresistancetestingrequirements(seeSupplementaryRequirementS1)5.1.7.3Reboundablesheetingrequirements(seeSupplementar

21、yRequirementS2)5.1.8Indicationthatthesheetingisintendedfwkzoneuseifapplicabletodeterminewhichweatheringrequirementsapply5.1.9Anyadditionalinfmation.6.PerfmanceRequirements6.1Thisisasummaryoftheminimumperfmancerequirement

22、sfeachtypeofretreflectivesheeting.6.1.1TypeI—MinimumCoefficientofRetreflection—Table1OutdoWeathering—24monthssee6.4DaytimeLuminanceFact—Table2Otherrequirements:Whensheetingisspecifiedfconstructionwkzoneapplicationstheout

23、doweatheringshallbe12months.6.1.2TypeII—MinimumCoefficientofRetreflection—Table3OutdoWeathering—36monthssee6.4DaytimeLuminanceFact—Table2Otherrequirements:Whensheetingisspecifiedfconstructionwkzoneapplicationstheoutdowea

24、theringshallbe12months.6.1.3TypeIII—MinimumCoefficientofRetreflection—Table4OutdoWeathering—36monthssee6.4DaytimeLuminanceFact—Table2Otherrequirements:Whensheetingisspecifiedfconstructionwkzoneapplicationstheoutdoweather

25、ingshallbe12months.6.1.4TypeIV—MinimumCoefficientofRetreflection—Table5OutdoWeathering—36monthssee6.4DaytimeLuminanceFact—Table2Otherrequirements:Whensheetingisspecifiedfconstructionwkzoneapplicationstheoutdoweatheringsh

26、allbe12months.6.1.5TypeV—MinimumCoefficientofRetreflection—Table6OutdoWeathering—36monthssee6.4DaytimeLuminanceFact—Table2Otherrequirements:Whensheetingisspecifiedfconstructionwkzoneapplicationstheoutdoweatheringshallbe1

27、2months.6.1.6TypeVI—MinimumCoefficientofRetreflection—Table7OutdoWeathering—6monthssee6.4DaytimeLuminanceFact—Table2.6.1.7TypeVII—RetreflectivesheetingmaterialspreviouslyclassifiedasTypeVIIhavebeenreclassifiedasTypeVIII.

28、6.1.8TypeVIII—MinimumCoefficientofRetreflection—Table8OutdoWeathering—36monthssee6.4DaytimeTABLE1TypeISheetingAObservationAngleEntranceAngleWhiteYellowangeGreenRedBlueBrown0.2?47050259.0144.01.00.23030227.03.56.01.70.30.

29、5?43025134.57.52.00.30.53015134.02.23.00.80.2AMinimumCoefficientofRetreflection(RA)cdfcft2(cdlx?1m?2).TABLE2DaytimeLuminanceFact(Y%)AColAllexceptTypeVTypeVMinimumMaximumMinimumMaximumWhite27...15Yellow15451230ange10307.0

30、25Green3.0122.511Red2.5152.511Blue1.0101.010Brown1.09.01.09.0FluescentYellowGreen60FluescentYellow40Fluescentange20FluescentPink25...ATheluminancefactsshownffluescentcolsconsistofthesumofareflectanceluminancefactfluescen

31、celuminancefact.TheluminancefactmaybedeterminedusingagoodapproximationtoIlluminantD65requiringaninstrumentwithanappropriatelyfilteredlightsourcebyusingabispectralphotometerconfmingtoTestMethodG147.TABLE3TypeIISheetingAOb

32、servationAngleEntranceAngleWhiteYellowangeGreenRedBlueBrown0.2?4140100603030105.00.23060362210124.02.00.5?45033209.0103.02.00.5302820126.06.02.01.0AMinimumCoefficientofRetreflection(RA)cdfcft2(cdlx?1m?2).TABLE4TypeIIIShe

33、etingAObservationAngleEntranceAngleWhiteYellowangeGreenRedBlueBrown0.1B?4300200120545424140.1B3018012072323214100.2?4250170100454520120.230150100602525118.50.5?495623015157.55.00.53065452510105.03.5AMinimumCoefficientofR

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