glossary.docx
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glossary.docx
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glossary
ABRASIVE-Hardgranularmaterialofvaryingfineness,usedingrindingand/orpolishing,orembeddedinmetaltoprovideanonslipsurface.[NOMMA-86]
ALUMILITE-AtradenameusedbytheAluminumCompanyofAmericaforitsclearorcolorimpregnatedanodizedfinishesinaluminum.[NOMMA-86]
ANCHOR-Anydeviceusedtosecureabuildingcomponenttoadjoiningconstructionorasupportingmember.[NOMMA-86]
ANCHORAGE-Methodoftyingtoadjoiningconstructionorsupportingmember.[NOMMA-86]
ANGLEDSTAIR-
(1)Astairinwhichsuccessiveflightsareatanangleorotherthan180degrees.[NOMMA-86]
(2)Astairinwhichsuccessiveflightsareatanangleofotherthan180degreestoeachother(often90degrees)withanintermediateplatform.betweenthem.[NAAMM-82]
ANNEAL-Toheatabovethecriticalorrecrystallizationtemperature,thencoolmetal,glassorothermaterials,toeliminatetheeffectsofcoldworking,relieveinternalstressesorimproveelectrical,magneticorotherproperties;tosoften.[NOMMA-86]
ANODICCOATING-Thesurfacefinishresultingfromanodizing.SeeAnodize.[NOMMA-86]
ANODIZE-Toprovideahardnon-corrosiveoxidefilmonthesurfaceofametal,particularlyaluminum,byelectrolyticactioninwhichthemetalbeingtreatedservesastheanode.[NOMMA-86]
ARCWELDING-Aprocessforthejoiningofmetalpartsbyfusion,withthenecessaryheatbeingproducedbyanelectricarcstruckbetweenanelectrodeandthemetalorbetweentwoelectrodes.[NOMMA-86]
ASFABRICATED-a)Atermreferringtothesurfaceappearanceandtextureproducedonmetalmillproductsbytheoriginalformingprocess.b)Atermreferringtothesurfaceappearanceofafabricatedmetalproductbeforetheremovalofanydisfigurationscausedbythefabricatingprocess.[NOMMA-86]
BALUSTER-Oneofaseriesofclosely-spaceduprightmemberswhichsupportthehandrailinarailing.AlsoreferredtoasaPicket,BalusterBar,Paling,SpacerBar,etc.[NOMMA-86]
BALUSTRADE-Arailingwhichiscomposedofbalusterscappedbyahandrail,oftenservingasanarchitecturalfeature.[NOMMA-86]
BAR-Around,square,rectangular,hexagonalorsimilarsectionofrolled,drawn,orextrudedmetal.[NOMMA-86]
BARSIZESECTION-Ahotrolledangle,channel,teeorzeehavingagreatestcross-sectionaldimensionlessthan3inches(76.2mm).[NOMMA-86]
BENDLINE-Pointofchangeofdirectionofastructure.[NOMMA-86]
BEVEL(ofstairs)-SeePitch(ofstairs).[NOMMA-86]
BLOWHOLE-Aholeorvoidinacasting,resultingfromentrainedgases.[NOMMA-86]
BONDERIZE-Chemicaltreatmentofsteelsurfaceofanothermember,tostrengthenandsupportit.
(2)Chemicaltreatmentofsteelsurfacewithproprietaryphosphatesolution,toprovidelimited,corrosionprotectionandimprovedpaintbase.[NOMMA-86]
BOTTOMRAIL-Lowermemberofrailingsystem,supportingbalustersorpanels,ifany.[NOMMA86]
BRACKET-Projectingmemberattachedtosurfaceofanothermember,tostrengthenandsupportit.[NOMMA-86]
BRAKING-Mechanicalbending,flanging,foldingandformingsheetorplatematerial,usingpressbrakeorfoldingbrake.[NOMMA-86]
BRAZING-Thejoiningofmetalpartsbyheatingthemand,bycapillaryaction,drawingamoltencopper-zincorotherbrazingalloybetweenthem.[NOMMA-86]
BUFFING-Theprocessofprovidingalustrousfinishbymeansofpower-operatedsoftfabricwheelscoatedwithawaxcompoundcontainingfineabrasiveparticles.[NOMMA-86]
BULLNOSESTEP-
(1)Stairtread,usuallyfirsttreadatflightbottom,withoneorbothendshavingsemi-circularorsimilarshapeinplanview.[NOMMA-86]
(2)Atreadwithoneorbothendshavingasemi-circularshapeinplan:
usuallythefirsttreadatthebottomofmemberprojectingbeyondsupports(s).[NAAMM-82]
BURNISHING-Developingsmooth,lustroussurfaceofmetalpartbytumblingindrumcontainingsmallsteelballsorbyrubbingwithhardpads.[NOMMA-86]
BUTTJOINTING-Fasteningsquarededgeorendofonemembertosquarededge,endorfaceofanothermemberwithoutoverlapping.[NOMMA-86]
CANTILEVER-Portionofmemberprojectingbeyondsupport(s).[NOMMA-86]
CAP-Afittingusedtoclosetheendofapipeortubularrailorpostorthetopendofatubularnewel.[NOMMA-86]
CAPRAIL-SeeHandrail.[NOMMA-86]
CARBONSTEEL-Steelhavingeither1)nospecifiedminimumcontentofalloyingelements;2)aspecifiedminimumcoppercontentnotexceeding0.40%,or3)maximumspecifiedpercentagecontentsasfollows:
manganese1.65,silicon0.60,copper0.60.[NOMMA-86]
CARBURIZING-Producinghardsurfacelayeronsteelbyheatingincarbonaceousmediumandsubsequentquenchingtoincreasecarboncontent.Alsoreferredtoas"Case-Hardening."[NOMMA-86]
CARRIERANGLE-Anangleconnectedtotheinsidefaceofastairstringertoformasupportingledgefortheendofatreadorriser.AlsoreferredtoasPitchBlock.[NOMMA-86]
CARRIERBAR-Aflatbarusedinthesamewayasacarrierangle.[NOMMA-86]
CARRIERS-Atermusedforcarrieranglesorbarsusedtosupporttreadsformedfrommetalstepsandgratings.[NOMMA-86]
CASE-HARDENING-SeeCarburizing.[NOMMA-86]
CASTING-Aproductformedbypouringmoltenmetalintoamold.[NOMMA-86]
CASTIRON-Ahard,brittle,non-malleablemetalwhichcanbeproducedinanyshape.Itcannotbehammeredorbent.Itisusedformanymiscellaneousmetalproducts.Bothfunctionalanddecorative,ithasgoodresistancetocorrosion.[NOMMA-86]
CAUSTICDIPPING-Immersingmetalinalkalinesolutiontochemicallycleanitssurface.[NOMMA-86]
CAUSTICETCH-Adecorativemattetextureproducedonaluminumalloysbytreatmentinanalkalinesolution,generallycausticsoda(sodiumhydroxide);alsoknownas"frostedfinish."[NOMMA-86]
CEMENT,QUICKSETTING-Usedintheinstallationofrailingpostssetinsleevesorholes.[NOMMA-86]
CHAMFER-Tobevelasharpedge.[NOMMA-86]
CHECKEREDPLATE-SeeFloorPlate.
CIRCULARSTAIR-Astairwhich,inplanview,hasanopencircularformwithasinglecenterofcurvature.SeealsoSpiralStair.[NOMMA-86]
CLIP-Smallfasteningdevice,usuallyofmetal,toholdelementorcomponentinplacebymechanicalactionorfriction.[NOMMA-86]
CLOSUREBAR-Aflatmetalbarconnectedinthefieldtothetopand/orbottomsurfaceoredgeofawallstringertoclosegapsbetweenthestringerandthewall.[NAAMM-82]
COLD-FINISHEDSTEEL-Carbonsteelwhichhasbeencleanedandpickled,thenrolledordrawnthroughdiestoproduceadimensionallyaccuratesectionwithimprovedsurfacefinishandoftenotherimprovedproperties.[NOMMA-86]
COLDROLLING-Bringingmetalsheet,plateorbartofinalthicknessandfinishingbypassingbetweenheavyrollerswithoutheating.[NOMMA-86]
COLLAR-SeeEscutcheon.[NOMMA-86]
COLUMN-Astructuralmemberwhichissubjectedprincipallytoaxialcompressionloading.[NOMMA-86]
CONSTRUCTIONJOINT-Discontinuityinstructure.[NOMMA-86]
COPE-Tocutawayaportionofonemember,eithertoformaclose-fittingjointwith,orprovideclearancefor,anothermember.[NOMMA-86]
CORROSION-Thedecayofmetals,usuallyfromoxidation.[NOMMA-86]
COR-TEN-ThetradenameusedbytheUnitedStatesSteelCorporationforitsweatheringtypeofsteel.SeeWeatheringSteel.[NOMMA-86]
COUNTERBORING-Enlargingentranceofholeforplacingboltheadornut.[NOMMA-86]
COUNTERSINKING-Bevelingendofholeforreceivingconicalheadofflat-oroval-headfastener.[NOMMA-86]
COVERFLANGE-SeeEscutcheon.[NOMMA-86]
CURVEDSTAIR-Astairwhich,inplanview,hastwoormorecentersofcurvature,beingoval,ellipticalorsomeothercompoundcurvedform.[NOMMA-86]
DECKING-Light-gaugefluted,ribbedorcellular,sheet-metalplatformforsupportingfloororroof.[NOMMA-86]
DEFLECTION-
(1)Bendingorsaggingdeformationofmember.[NOMMA-86]
(2)Abendingdeformationofastructuralmember,usuallywithintheelasticrangeofthematerial.[NAAMM77]
DRAINAGEHOLE-SeeVentHole.[NOMMA-86]
DRAWING-Theprocessofpullingmetalinsolidformthroughdiestoalteritsfinish,mechanicalpropertiesorcross-sectionalshape.[NOMMA-86]
DRAWINGS-Architecturalandstructuralplan,oftenpreparedbyarchitectorengineer.Theyshouldindicatebyplan,elevationsectionanddetailthelocation,quantity,sizeandextentofproducttobefurnished.[NOMMA-86]
DRAWINGS,SHOP-SeeShopDrawings.[NOMMA-86]
DRIFTPIN-Tapered,roundrodusedtoalignholesintwoormorepiecesofmetal.[NOMMA-86]
DROP(Stairs)-Afittingusedtoclosethebottomendofatubularnewel.[NOMMA-86]
DURANODIC-TradenameusedbytheAluminumCompanyofAmericaforitshardanodiccoatings.SeHardAnodicCoating.[NOMMA-86]
EASEMENT(Stairs)-Thatcurvedportionofahandrailwhichformsatransitioninaverticalplane,betweenahorizontalandaninclinedsectionofthehandrail.[NOMMA-86]
ELASTICLIMIT-Themaximumunitstresswhichcanbeappliedtoamaterialwithoutcausingpermanentdeformation.[NOMMA-86]
EMBED-Tocastintoconcrete.[NOMMA-86]
EMBOSSED-Havingaraisedand/orindentedpatternimpressedoneitheroneorbothsurfaces(ofasheetmaterial)bymeansofpatternedrollsorstampingdies.[NOMMA-86]
ESCUTCHEON-Protectiveorornamentalcoverlocatedusuallyatandaroundbaseofpostorpicket,baluster,orwherearailterminatesagainstawall.AlsorefereedtoasCoverFlange,Collar,WallCliporWallFlange.[NOMMA-86]
EXPANSIONJOINT-Acontroljointdesignedtoallowfordifferentialmovementofthejoiningpartsduetothermalexpansionand/orcontraction,eliminatingmomenttransfer.[NOMMA-86]
EXTRUSION-a)Theprocessofproducingmetalshapesbyforcingheatedmetalthroughanorificeinadiebymeansofapressureram.b)Anyitemmadebythisprocess.[NOMMA-86]
FAB
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