Designation:A886/A886M−16StandardSpecificationforSteelStrand,Indented,Seven-WireStress-RelievedforPrestressedConcrete1ThisstandardisissuedunderthefixeddesignationA886/A886M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstwotypesandtwogradesofindentedseven-wireuncoated,steelstrandforuseinpre-stressedconcreteconstruction.Thetwotypesofstrandarelow-relaxationandstress-relieved(normal-relaxation).Grade250I[1725I]andGrade270I[1860I]haveminimumtensilestrengthsof250ksi[1725MPa]and270ksi[1860MPa],respectively,basedonthenominalareaofthestrand.1.2Thisspecificationisapplicableforordersineitherinch-poundunits(asSpecificationA886)orinSIunits(asSpecificationA886M).1.3Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththespecifi-cation.2.ReferencedDocuments2.1ASTMStandard:2A1061/A1061MTestMethodsforTestingMulti-WireSteelPrestressingStrand2.2U.S.MilitaryStandard:MIL-STD-129MarkingforShipmentandStorage32.3U.S.FederalStandard:Fed.Std.No.123MarkingforShipments(CivilAgencies)33.Terminology3.1DefinitionofTermSpecifictothisSpecification:3.1.1strand,n—agroupofwireshavingacenterwireenclosedtightlybysixhelicallyplacedouterwireswithuniformpitchofnotlessthan12andnotmorethan16timesthenominaldiameterofthestrand.3.1.1.1Discussion—Thedirectionoflayiseitherright-handedorleft-handed.4.OrderingInformation4.1Itshallbetheresponsibilityofthepurchasertospecifyallrequirementsthatarenecessaryformaterialorderedunderthisspecification.Suchrequirementstobeconsideredinclude,butarenotlimitedto,thefollowing:4.1.1Quantity(feet[metr...
