Designation:E1091−13StandardSpecificationforNonmetallicHoneycombCoreforUseinShelterPanels1ThisstandardisissuedunderthefixeddesignationE1091;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationisfornonmetallichoneycombcoreusedinthemanufactureofadhesivelybondedsandwichpanelsfortacticalshelters.ThematerialsareintendedforadhesivebondingtoaluminumfacingsusingmaterialsandprocessesdefinedbyPracticesE864andE874andSpecificationsE865,E866,andE990.Thisspecificationcoversfivemaintypesofhoneycombforuseinsandwichpanels,TypesI,II,III,IV,andV.TypesI,II,andIIIhoneycombscorrespondtothreehoneycombdensities.TypesIVandVaresimilartoTypesIIandIII,respectively,buthavelowerperformancerequire-ments.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.ForconversionofquantitiesinvarioussystemsofmeasurementtoSIunits,refertoPracticeE380.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2B209SpecificationforAluminumandAluminum-AlloySheetandPlateC177TestMethodforSteady-StateHeatFluxMeasure-mentsandThermalTransmissionPropertiesbyMeansoftheGuarded-Hot-PlateApparatusC366/C366MTestMethodsforMeasurementofThicknessofSandwichCoresC481TestMethodforLaboratoryAgingofSandwichCon-structionsC518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusE380PracticeforUseoftheInternationalSystemofUnits(SI)(theModernizedMetricS...
