AISC 121-05 standard definitions for use in the de

AISCANDAISISTANDARDStandardDefinitionsforUseintheDesignofSteelStructures2004EDITIONApprovedbytheAISCCommitteeonSpecificationsandtheAISICommitteeonSpecificationsfortheDesignofCold-FormedSteelStructuralMembersThematerialcontainedhereinhasbeendevelopedbyajointeffortoftheAmericanInstituteofSteelConstructionCommitteeonSpecificationsandtheAmericanIronandSteelInstituteCommitteeonSpecifications.Theorganizationsandthecommitteeshavemadeadiligentefforttopresentaccurate,reliable,andusefulinformationonjointterminologyusedinthestandardsdevelopedbytheconsensusbodiesofbothorganizations.TheCommitteesacknowledgeandaregratefulfortheparticipationofthenumerousresearchers,engineers,andotherswhohavecontributedtothebodyofknowledgeonthesubject.Itisanticipatedthattheterminologywillbeexpandedandupdatedinfutureeditions.1stPrinting–April2005ProducedbytheAmericanInstituteofSteelConstructionandtheAmericanIronandSteelInstituteCopyrightAmericanInstituteofSteelConstructionandAmericanIronandSteelInstitute2005StandardDefinitionsforUseintheDesignofSteelStructuresJuly20041STANDARDDEFINITIONSFORUSEINTHEDESIGNOFSTEELSTRUCTURESPREFACEInanefforttostandardizeterminologyusedforthedesignofsteelstructures,theCommitteesonSpecificationsoftheAmericanInstituteofSteelConstructionandtheAmericanIronandSteelInstituteformedajointCommitteeonTerminologytodevelopacommonterminologyforusebyallstandardscommitteesofbothinstitutes.Wearepleasedtopresentthisfirsteditionoftheterminologystandard.Thetermspresentedhereinhavebeenapprovedbybothcommitteesinaccordancewithouroperatingprocedures.Thesetermsareonlyasub-setofthecompleteglossarylistsgivenintheAISIandAISCStandards.Todate,theterminologyinthisstandardhasbeenusedasthebasisforthefollowingstandards:AmericanInstituteofSteelConstruction•SpecificationforStructuralSteelBuildings(ANSI/AISC360)•SeismicProvisionsforStructuralSteelBuildings(ANSI/AISC341)•PrequalifiedConnectionsforSpecialandIntermediateMomentFramesinSeismicApplications(ANSI/AISC358)AmericanIronandSteelInstitute•StandardforCold-FormedSteelFraming,2004Edition--ƒGeneralProvisionsƒHeaderDesignƒLateralDesignƒWallStudDesignƒTrussDesignAISIStandardspublishedafter2005wherethesetermsareexpectedtobeused:•NorthAmericanSpecificationfortheDesignofCold-FormedSteelStructuralMembers•StandardforCold-FormedSteelFraming-•PrescriptiveMethodforOneandTwoFamilyDwellings•ProductData•LoadandSpanTablesItisalsosuggestedthatothersteel-relatedstandardsusethesetermsinanefforttobringcommonality,wherepossible,acrossthedesignofallsteelstructures.Weexpectthatfutureeditionsofthisstandardwillexpandtoincludeadditionalcommontermsandnomenclature.AmericanInstituteofSteelConstructionAmericanIronandSteelInstituteStandardDefinitionsforUseintheDesignofSteelStructures2July2004AISCandAISICommitteeonTerminologyHarryW.Martin,ChairmanReidarBjorhovdeRogerL.BrockenbroughHelenH.ChenCynthia.J.DuncanStevenJ.FenvesJamesHarrisRichardC.KaehlerJackPetersenClarksonW.PinkhamWei-WenYuAISCCommitteeonSpecificationsJamesM.Fisher,RogerE.Ferch,CynthiaJ.Duncan,ChairmanViceChairmanSecretaryHansrajG.AsharWilliamF.BakerJohnM.BarsomWilliamD.BastReidarBjorhovdeRogerL.BrockenbroughGregoryG.DeierleinDuaneS.EllifrittBruceR.EllingwoodMichaelEngelhardtShu-JinFangStevenJ.FenvesJohnW.FisherTimothyP.FraserTheodoreV.GalambosLouisF.GeschwindnerLawrenceG.GriffisJohnL.GrossTonyC.HazelMarkV.HollandLawrenceA.KloiberRobertoT.LeonStanleyD.LindseyJamesO.MalleyRichardW.Marshall(deceased)HarryW.MartinDavidL.McKenzieDuaneK.MillerThomasM.MurrayR.ShankarNairJackE.PetersenDouglasA.Rees-EvansRobertShawDonaldR.ShermanW.LeeShoemakerWilliamA.ThorntonRaymondH.R.TideAISICommitteeonSpecificationsfortheDesignofCold–FormedSteelStructuralMembersRogerL.Brockenbrough,JayW.Larson,HelenH.Chen,ChairmanViceChairmanSecretaryDonAllenReidarBjorhovdeJamesK.CrewsDanielA.CuocoL.RandyDaudetEdwardR.diGirolamoCynthiaJ.DuncanDuaneS.EllifrittEdwardR.Estes,Jr.JamesM.FisherStevenR.FoxJavierG.GarzaW.BrentHallGregoryJ.HancockAllenJ.HarroldRichardB.HawsJoseL.HernandezDonaldL.JohnsonJeffreyM.KlaimanRogerA.LaBoubeRobertL.MadsenJohnMattinglyJamesA.MosesThomasM.MurrayJoeN.NunneryTeomanB.PekozClarksonW.PinkhamVincentE.SaganMagdalenaSaldivarBenjaminW.SchaferReinholdM.SchusterPaulA.SeaburgW.LeeShoemakerThomasSputoMarkA.ThimonsThomasW.J.TrestainDennisP.WatsonWei-WenYuStandardDefinitionsforUseintheDesignofSteelStructuresJuly20043STANDARDDEFINITIONSFORUSEINTHEDESIGNOFSTEELSTRUCTURESASD(AllowableStrengthDesign).MethodofproportioningstructuralcomponentssuchthattheallowablestrengthequalsorexceedstherequiredstrengthofthecomponentundertheactionoftheASDloadcombinations.ASDLoadCombination.Loadcombinationintheapplicablebuildingcodeintendedforallowablestrengthdesign(allowablestressdesign).AllowableStrength*.Nominalstrengthdividedbythesafetyfactor,Rn/Ω.ApplicableBuildingCode.Buildingcodeunderwhichthestructureisdesigned.AvailableStrength*.Designstrengthorallowablestrengthasappropriate.BracedFrame.Anessentiallyverticaltrusssystemthatprovidesresistancetolateralloadsandprovidesstabilityforthestructuralsystem.Cold-