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ID:23507189
大小:110.69 KB
页数:18页
时间:2018-11-08
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1、AASHTOAmericanAssociationofStateHighwayandTransportationOfficials.Governingbodyresponsibleforthefollowingpolespecification:"StandardSpecificationsforStructuralSupportsforHighwaySigns,Luminaires,andTrafficSignals."(AlsocalledLTS-2)ACORNNUTDecorativeanchorboltnutwithen
2、closedroundedtop.AGENTRepresentativeofmanufacturedproductsandresponsibleforcommunication,salesandserviceofcustomerswithinaspecifiedregion.AISCAmericanInstituteofSteelConstructionALLOWABLESTRESSMaximumpermissiblestressasdefinedbydesigncriteria.ALLOYAcompoundmixturecon
3、sistingofoneormorebaseelements(metal)toachievedesiredphysicalormechanicalproperties.Examplesofdifferentaluminumallowsareasfollows:6063:Standardpoleandarmshaftmaterial.4043:Standardaluminumweldingelectrode.5356:Standardaluminumweldingelectrode.6061:Specialpoleandarmsh
4、aftmaterial.356:Standardflangebasecastingmaterial.ALUMINUMAsilver-whitenon-ferrousmetallicelementwhosefeaturesandphysicalpropertiesinclude:agoodresistancetotemperaturevariations,highreflectivity,resistancetooxidation,ductility,lightweight,andrecyclable.ANCHORBASESee"
5、FixedBase"ANCHORBOLTThreadedsteelrodembeddedintoconcreteandusedtoconnectthepoletothefoundation.ANGLEIRONpingANODIZINGTheprocessofcoatingametallicsurfaceelectrolytically.Thisprocessnormallyinvolvesthecombinationofelectricalcurrentandchemicalbathinwhichthematerial'ssur
6、faceor"skin"isalteredtoformaprotectiveshieldfortheremainingmaterialANSIAmericanNationalStandardsInstituteAPPROVALDRAWINGFormaldrawingsubmittedtocustomerfortheirreviewtodetermineacceptabilityofproduct.ARCHITECTURALCOATINGSpecialfinishcoatingdesignedtogivetheappearance
7、ofconcrete,marble,graniteorsandstone.ARGONInertgaselementutilizedasashieldingcomponentof"gasmetalarcwelding"(GMAW)or"metalinertgaswelding"(MIG).Generallyutilizedwhenweldingaluminumorlikematerials.ARMAsingleextensionofanycrosssectionusedtomountasinglefixture.ARMRISETh
8、everticaldistancefromthecenterlineofthesimplexconnectiontothecenterlineofthearmend.ARTIFICIALAGINGProcessofheatingandcoolingamateri
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