Designation:D7199−07(Reapproved2012)StandardPracticeforEstablishingCharacteristicValuesforReinforcedGluedLaminatedTimber(Glulam)BeamsUsingMechanics-BasedModels1ThisstandardisissuedunderthefixeddesignationD7199;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversmechanics-basedrequirementsforcalculatingcharacteristicvaluesforthestrengthandstiffnessofreinforcedstructuralgluedlaminatedtimbers(glulam)manu-facturedinaccordancewithapplicableprovisionsofANSI/AITCA190.1,subjectedtoquasi-staticloadings.Itaddressesmethodstoobtainbendingpropertiesparalleltograin,aboutthex-xaxis(FbxandEx)forhorizontally-laminatedreinforcedglulambeams.Secondarypropertiessuchasbendingaboutthey-yaxis(Fby),shearparalleltograin(FvxandFvy),tensionparalleltograin(Ft),compressionparalleltograin(Fc),andcompressionperpendiculartograin(Fc')arebeyondthescopeofthispractice.Whendeterminationofsecondarypropertiesisdeemednecessary,testingaccordingtootherapplicablemethods,suchasTestMethodsD143,D198oranalysisinaccordancewithPracticeD3737,isrequiredtoestablishthesesecondaryproperties.Reinforcedglulambeamssubjectedtoaxialloadsareoutsidethescopeofthisstandard.Thispracticealsoprovidesminimumtestrequirementstovalidatethemechanics-basedmodel.1.2Thepracticealsodescribesaminimumsetofperformance-baseddurabilitytestrequirementsforreinforcedglulams,asspecifiedinAnnexA1.Additionaldurabilitytestrequirementsshallbeconsideredinaccordancewiththespecificend-useenvironment.AppendixX1providesanex-ampleofamechanics-basedmethodologythatsatisfiestherequirementssetforthinthisstandard.1.3Characteristicstrengthandelasticpropertiesobtainedusingthisstandardmaybeusedasabasisfordevelopingdesignvalues.However,thepropersafety,serviceabilityandadjustmentfactorsincludingdurationofload,tobeusedindesignareoutsidet...
