Designation:D6039/D6039M−11StandardSpecificationforOpenandCoveredWoodCrates1ThisstandardisissuedunderthefixeddesignationD6039/D6039M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversfivetypesandtwostylesofopenandonetype,andonestyleofcoveredwoodcratesdesignedfornetloadsnotexceeding4000lb[1814kg].Opencratesaresuitableforshipmentofitems,whicharenotreadilysusceptibletodamagefromoutsideforces,andwhichrequireonlylimitedprotectionagainsttheelements.1.2Ifenvironmentalprotectionisnecessary,useofashroudoracoveredcrateshouldbeconsidered.WiththeexceptionofTypeIII,StyleBcrates,thecratesincludedinthisspecificationareforuseindomesticandoverseasshipmentofnetloadsnotover4000lb[1814kg].UseshallbeconfinedtoitemsfallingwithinthedimensionsandweightlimitationsofthetypesandgradesspecifiedinTable1.1.3Ingeneral,StyleAcrateshaveheaviercomponentsandaretowithstandratherseverehandlingandmultipleshipments(heavy-duty),whileStyleBcratesshouldbeconfinedtohandlingandshippingthatimposeonlylighttomoderatehazardsonthecontainer(light-duty).TypesI,IV,andVcratesaregeneralpurposetypes;TypeIIcratesaredesignedforitemssuchasladders,tubing,extrusions,orwallboardwhichdonotrequireblocking,bracing,orcushioning;andTypeIII,StyleBcratesaredesignedforsuchself-supportingmaterialaschannels,angles,orotherstructuralmemberswherethecontainerservesonlyasameansformoreconvenientstackingandhandling.1.4Iftheuseofotherconstructionmethodsortechniquesisacceptableandpermitted(see5.1.13),theresultingpackagingsystemsshallbeofequalorbetterperformancethanwouldresultfromtheuseofthesespecifiedmaterialsandprocedures.TheappropriatedistributioncyclespecifiedinPracticeD4169canbeusedtodevelopcomparativeproceduresandcriteria.1.5Thev...
