A: Area, Ampere; Acre; Alcove; Compressed Air LineAB: Anchor Bolt; Asbestos BoardABV: AboveAC: Air Conditioning, Alternating Current, AcousticalACC: AccessACF: Architectural Concrete FinishACFL: Access FloorACI: American Concrete InstituteACL: Across the LineACOUST: AcousticalACPL: Acoustical PlasterACR: AcrylicACST: AcousticACT: Acoustical Tile; ActualAD: Access Door, Area DrainADA: Americans with Disabilities Act of 1992ADAAG: Americans with Disabilities Act Architectural Guidelines ADD: Addendum; AdditionADDL: AdditionalADH: AdhesiveADJ: Adjust, Adjustable, AdjacentAF: Above the FloorAFF: Above Finished FloorAGA: American Gas AssociationAGG: AggregateAGGR: AggregateAIA: American Institute of Architects, American Insurance Association AIC: Amperes Interrupting CircuitAIEE: American Institute of Electrical EngineersAISC: American Institute of Steel ConstructionAL: AluminumALM: AlarmALT: Alternate, Alteration; AltitudeALUM: AluminumALS: Acrylic Latex SealantAMB: AmbientAMP: Ampere, AmpacityAMPY: AmpereAMT: AmountAN: AnodeANCH: Anchor, AnchorageANN: AnnunciatorANOD: AnodizedANT: AntennaAP: Access PanelAPPD: ApprovedAPPROX: ApproximateAPRVD: ApprovedAPT: ApartmentAPX: ApproximateAR: Acid ResistingARCH: Architect, ArchitecturalARS: Asbestos Roof ShinglesAS: Acoustic SealantASB: AsbestosASC: Above Suspended CeilingASCE: American Society of Civil Engineers ASME: American Society of Mechanical Engineers ASPH: AsphaltASSEM: AssembleASSOC: Association; AssociateASSY: AssemblyASTM: American Society for Testing and Materials AT: Acoustical Tile; Asphalt TileATC: Acoustical Tile CeilingATTEN: AttenuationATM: Automatic Teller Machine; Atmospheric AUTH: AuthorizedAUTO: AutomaticAVG: AverageAW: Acid WasteAWG: American Wire GaugeAWM: Automatic Washing MachineAWS: American Welding SocietyAWWA: American Water Works Association AX: AxisB: Boiler, Bathroom, BidetB TO B: Back to BackB & B: Balled and Burlapped, Bell and BellB & F: Bell and FlangeB & S: Bell and Spigot, Brown & SharpB/: Bottom (of)BBD: Bulletin BoardBA: Bulb AngleBAL: Balance, BallastBAF: BaffleBB: Buffalo Box, Ball Bearing,, Bulletin BoardBBL: BarrelBC: Broom ClosetBD: Board, Blow Down (pipe)BDL: BundleBDY: BoundaryBDRM: BedroomBEL: BelowBET: BetweenBETW: BetweenBEV: BevelBF: Board Foot, Back Face, Bottom Face, Both Faces, Boiler Feed ; DP: Cleanout & Deck PlateCOEF: CoefficientCOL: ColumnCOM: CommonCOMB: Combination, CombustionCOML: CommercialCOMM ED: Commonwealth EdisonCOMP: Composition, CompressedCOMPO: CompositionCOMPT: CompartmentCON: ConstructionCONC: ConcreteCONCP: Concrete PaintedCOND: Condenser, ConduitCONN: ConnectionCONST: ConstructionCONSTR: ConstructionCONT: Continuous, Continue, ControlCONTR: ContractorCONV: Convector, ConvenienceCOP: CopperCOR: Corner, CorridorCORR: Corridor, CorrugateCOV: CoverCP: Cathodic Protection, Clothes Pole, CesspoolCPE: Chlorinated PolyethyleneCPL: Cement PlasterCPP: Cement Plaster PaintedCPR: CopperCPT: CarpetCR: Chromium (plated), Curtain RodCRPT: CarpetCRS: Course, Cold Rolled SteelCS: Countersink, Cast Steel, Cast Stone, Commercial Standard CSG: CasingCSK: CountersinkCSMT: CasementCSN: CaissonCSS: Countersunk ScrewCSTG: CastingCT: Ceramic Tile, Cork Tile,Cone Tip (hinges)CTD: CoatedCTR: Center, CounterCTSC: Communications Systems Terminal CabinetCTSK: CountersunkCTWT: CounterweightCU: Copper, Cubic, Coefficient of UtilizationCU. FT.: Cubic FeetCU. YD.: Cubic YardCUR: CurrentCV: Check ValveCW: Clockwise, Cold WaterCWP: Circulating Water PumpCWR: Condensate Waste ReturnCWS: Condensate Waste SupplyCY: Cubic Yard, CycleCYL: CylinderCYL L: Cylinder LockD: Deep, Depth, Drop, DrainD & M: Dressed & MatchedDA: Double ActingDB: DecibelDBL: DoubleDBT: Drybulb TemperatureDC: Direct CurrentDCV: Detector Check ValveDD: Driveway Drain, Deck DrainDEG: DegreeDEGC: Degree CelciusDEGF: Degree FarenheitDEM: DemolishDEMO: DemolitionDEP: DpressedDEPT: DepartmentDET: DetailDF: Drinking FountainDH: Double HungDIAG: DiagonalDIA: DiameterDIAM: DiameterDIFF: DiffuserDIM: DimensionDISL: DisposalDISP: DispenserDIV: DivisionDL: Dead LoadDMH: Drop ManholeDMT: DemountableDN: DownDO: Ditto, or Door OpeningDP: Dampproofing, Dew Point, Distribution Panel DPDT: Double Pole Double ThrowDPST: Double Pole Single ThrowDPR: DamperDR: Door, Drain, Dining RoomDRBD: DrainboardDS: Downspout, Disconnect Switch, Door Switch DSP: Dry StandpipeDT: Drain TileDTL: DetailDVTL: DovetailDW: Dumbwaiter, Distilled WaterDWG: DrawingDWGS: DrawingsDWL: DowelDWP: Drywall, PaintedDWR: DrawerDS: DownspoutDSP: Dry StandpipeDX: Direct Expansion, DuplexE: East, Enamel, ExhaustE TO E: End to EndEA: EachEB: Expansion BoltEC: Exposed ConstructionECC: EccentricECP: Exposed Construction PaintedEDR: Equivalent Direct RadiationEE: Each EndEF: Each FaceEFTS: Expanding Foam Tape SealantEG: Edge GrainEIFS: Exterior Insulation and Finish System EJ: Expansion JointEJECT: EjectorEL: Elevation, ElevatorELB: ElbowELEC: ElectricalELECT: ElectricalELEV: Elevator, ElevationELP: Emergency Lighting PanelEM: EmergencyEMER: EmergencyENAM: EnamelENCL: EnclosureENG: EngineerENGR: EngineerENJF: Expanded Neoprene Joint Filler ENT: EntranceENTR: EntranceEP: Electrical Panelboard, Explosion Proof EPDM: Ethylene Propylene Diene Monomer EPJF: Expanded Polyethelene Joint Filler EQ: EqualEQP: EquipmentEQPT: EquipmentEQUIP: EquipmentERP: Emergency Receptacle PanelESC: EscalatorEST: EstimateEVAP: EvaporatorEW: Each WayEWC: Electric Water CoolerEW & C: Electric Wiring and Communication EWH: Electric Water HeaterEX: Exposed Construction, ExitEXC: ExcavateEXCAV: ExcavateEXEC: ExecutiveEXG: ExistingEXH: ExhaustEXH AIR: Exhaust AirEXIST: ExistingEXP: Expansion, ExposedEXPN: ExpansionEXPP: Existing Patched and PaintedEXS: Extra StrongEXT: Exterior, ExtinguishEXTR: ExtrudeF: Degrees Fahrenheit, FuseF TO F: Face to FaceFA: Fire Alarm, Fresh AirFAB: FabricateFABR: FabricateFACP: Fire Alarm Control PanelFAG: Fire Alarm GongFAO: Finish All OverFAR: Floor Area RatioFAST: Fastener, FastenFB: Flat Bar, Face Brick, Floor BoxFBD: FiberboardFBM: Foot Board MeasureFBP: Fabric PanelFBRK: Fire BrickFC: File Cabinet, Foot Candle, Fault Current FD: Floor drainFDC: Fire Department ConnectionFDN: FoundationFDTN: FoundationFE: Fire ExtinguisherFEC: Fire Extinguisher CabinetFF: Far Face, Finished Floor, Factory Finish FFE: Finished Floor ElevationFF&E: Fixtures, Furnishings & Equipment FFL: Finished Floor LineFGL: FiberglassFGR: Fiberglass reinforcedFH: Flat Head, Fire HoseFHC: Fire Hose CabinetFHMS: Flat head machine screwFHR: Fire Hose RackFHS: Fire Hose StationFHWS: Flat Head Wood ScrewFHY: Fire HydrantFIL: FilletFIN: Finish, finishedFITG: FittingFIX: FixtureFIXT: FixtureFL: Floor, Fire LineFLASH: FlashingFLG: FlooringFLEX: FlexibleFLG: Flange, Flashing, FlooringFLR: FloorFLUOR: FluorescentFLX: FlexibleFM: Fire Main, Factory Mutual CompanyFND: Feminine Napkin Dispenser, FoundationFO: Finished OpeningFOB: Free On BoardFOC: Face of ConcreteFOF: Face of FinishFOS: Face of StudsFP: FireproofFPL: FireplaceFPM: Feet per minuteFPRF: FireproofFPS: Feet per SecondFR: Frame, Front, Fire RiserFRG: ForgedFRM: FrameFRPF: FireproofFRT: Fire RetardantFS: Full Size, Far Side, Federal Standards, Fused Switch, Floor Sink FSCW: Flush Solid Core WoodFT: Foot, Feet, Fully TemperedFTG: Footing, FittingFUR: FurredFURN: Furnish, FurnitureFURR: FurringFUT: FutureFVC: Fire Valve CabinetG: Gas, Girder, Gutter, GramGA: Gauge, GageGAGE: GaugeGAL: GallonGALV: GalvanizedGB: Grab Bar, Glass Block, Gypsum Board GC: General ContractorGCMU: Glazed Concrete Masonry Unit GD: Guard, Grade, Gutter DrainGEN: General, GeneratorGENL: GeneralGF: Ground FaceGFCI: Ground Fault Circuit Interrupted GFI: Ground Fault InterruptedGFRC: Glass Fiber Reinforced Concrete GI: Galvanized IronGKT: GasketGL: GlassGL BLK: Glass BlockGLB: Glass BlockGLVA: Globe ValveGLZ: GlazeGMU: Glazed Masonry UnitGND: GroundGOVT: GovernmentGP: Galvanized PipeGPDW: Gypsum DrywallGPH: Gallons Per HourGPL: Gypsum LathGPM: Gallons Per MinuteGPP: Gypsum Plaster PaintedGPPL: Gypsum PlasterGPS: Gallons Per SecondGR: Grade, Grille, GraniteGRAN: Granular, GraniteGRND: GroundGRTG: GratingGSS: Galvanized Sheet SteelGSU: Glazed Structural UnitGT: GroutGV: GalvanizedGVA: Gate ValveGVL: GravelGYP: GypsumGYP BD: Gypsum BoardH: HighHA: HectareHB: Hose BibHBD: HardboardHC: Hollow Core, Handicapped (better called Accessible" ) HCT: Hollow Clay TileHD: Head, Heavy DutyHDCP: Handicapped (better called " Accessible" )HDN: HardenHDR: HeaderHDW: HardwareHDWD: HardwoodHDWE: HardwareHEX: HexagonalHGR: HangerHGT: HeightHH: HandholeHHMB: Hex Head Machine BoltHID: High Intensity DischargeHK: Hook or HooksHKD: Hooked (re-bars)HL: Hydrant LineHM: Hollow MetalHMP: Hollow Metal, PaintedHNCG: Hollow Neoprene Compression GasketHOR: HorizontalHORIZ: HorizontalHOSP: HospitalHP: High Point, High Pressure, Horse PowerHPS: High Pressure Sodium, High Pressure SteamHR: HourHRS: Hot Rolled Steel, HoursHS: Heat StrengthenedHSG: HousingHT: Height, Heat, High Tension DuctHTG: HeatingHTR: HeaterHTW: High Temperature WaterHV: High VoltageHVAC: Heating, Ventilating & Air ConditioningHVY: HeavyHW: Hot Water, Heavy WallHWC: Hot Water Circulating, Heavy Wall Conduit HWD: HardwoodHWH: Hot Water HeaterHWR: Hot Water Recirculating Return HWS: Hot Water SupplyHWY: HighwayHYD: HydraulicHYDRO: HydrostaticHZ: Hertz (Cycles Per Second)I: Iron, Current (electrical)IBV: Indicating Butterfly ValveIC: Interrupting CapacityID: Inside DiameterIE: Invert ElevationILK: InterlockIMH: Inlet ManholeIN: InchINC: IncandescentINCAND: IncandescentINCIN: IncineratorINCL: Incline, IncludeINCR: IncreaseINFO: InformationINS: Insulate, InsulationINSP: InspectINSTL: InstallINSUL: InsulationINT: Interior, InternalINTERM: IntermediateINTM: IntermediateINV: InvertIP: Iron PipeIPS: Iron Pipe SizeIW: Indirect WasteJ: JoistJ-BOX: Junction BoxJAN: JanitorJB: Junction BoxJC: Janitor's ClosetJCT: JunctionJF: Joint FillerJST: JoistJT: JointK: Kilopound (1000 pounds), Kelvin (temperature) KAL: KalameinKCP: Keene's Cement PlasterKG: KilogramKIP: Kilopound (1000 pounds)KIT: KitchenKM: KilometerKO: KnockoutKP: KickplateKPL: KickplateKS: Kitchen SinkKVA: Kilovolt-AmpereKW: KilowattKWH: Kilowatt HourKWHR: Kilowatt HourL: Angle, Left, Length, Lighting Panel, Long, Line LA: Landscape Architect, Lightning ArresterLAB: Laboratory, LaborLAD: LadderLAM: Laminate, LaminatedLAT: LateralLAV: LavatoryLB: Pound (weight), Lag BoltLBL: LabelLBR: LumberLC: Light Control, Lead CoveredLCD: Liquid Crystal DiodeLCL: Linen ClosetLCM: Lead Coated MetalLD: Leader DrainLH: Left HandLIB: LibraryLIBR: LibraryLIN: LinearLINO: LinoleumLIQ: LiquidLKR: LockerLL: Live LoadLMS: LimestoneLN: LengthLNDG: LandingLNTL: LintelLOC: LocateLOCS: LocationsLP: Low Point, Low Pressure, Lighting Panel, Light Proof LPS: Low Pressure Sodium, Low Pressure SteamLR: Living RoomLS: Limestone, Loud SpeakerLT: Light, Low Tension Duct, Laundry TrayLTG: LightingLTL: LintelLT WT: LightweightLV: Low VoltageLVR: LouverLW: Light WeightLWC: Light Weight ConcreteLWDP: Louvered Wood Door, PaintedM: Meter, Motor, Thousand (brick), Bending Moment MACH: MachineMAINT: MaintenanceMAN; ManualMAR: MarbleMARB: MarbleMAS: MasonryMAT: MaterialMATL: MaterialMAX: MaximumMB: Mail Box, Machine Bolt, Mop BasinMC: Medicine Cabinet, Mineral CoreMCC: Motor Control CenterMCM: Thousand Circular Mils (electrical wire size) ME: Mechanical EngineerMECH: MechanicalMED: MediumMED CAB: Medicine CabinetMEMB: MembraneMERC: Mercury VaporMET: MetalMEZZ: MezzanineMFD: Manufactured, Metal Floor DeckMFG: Manufacturer, ManufacturingMFR: Manufacture, ManufacturerMH: ManholeMI: Malleable Iron, MilesMIKE: MicrophoneMIN: MinimumMIR: MirrorMISC: MiscellaneousMK: MarkML&P: Metal Lath & PlasterMLD: MoldingMLDG: MoldingMM: MillimeterMMB: MembraneMO: Masonry OpeningMOD: ModuleMONO: MonolithicMOV: MovableMP: Metal Acoustal PanelMPS: Medium Pressure SteamMR: Mop ReceptorMRD: Metal Roof DeckMT: Mount, MountedMTD: MountedMTL: Material, MetalMTR: MotorMUL: MullionMULL: MullionMV: Mercury VaporMWP: Maximum Working PressureMWK: MillworkN: North, NitrogenNAP: NapkinNAT: NaturalNATL: NaturalNB: " Nota Bene" Latin phrase for " Take Special Note" NC: Normally Closed, Noise CriteriaNEC: National Electrical CodeNEUT: NeutralNF: Near FaceNFWH: Non-freeze Wall HydrantNI: NickelNIC: Not In ContractNK: NeckNMT: Non-MetallicNO: Number, Normally OpenNOM: NominalNR: Noise ReductionNRC: Noise Reduction CoefficientNRP: Non-Removable PinNRS: Non Rising Steam ValveNS: Near SideNTS: Not To ScaleO: OxygenO TO O: Out to OutOA: Outside Air, OverallOB: ObscureOBS: ObscureOC: On CenterOD: Outside DiameterOF: Outside FaceOFF: OfficeOH: OverheadOHD: Overhead DoorOHMS: Oval Head Machine ScrewOHWS: Oval Head Wood ScrewOI: Ornamental IronOP: OpaqueOPG: OpeningOPNG: OpeningOPP: OppositeOPP H: Opposite HandOR: Outside RadiusORN: OrnamentalOSD Open Sight DrainOS&Y: Outside Screw & Yoke (valve)OUT: OutletOVFL: OverflowOW: Open WasteOZ: OunceP: Pitch, Power Panel, PaintP. LAM: Plastic LaminateP SL: Pipe SleevePA: Public AddressPAF: Powder Actuated FastenersPAR: ParallelPARTN: PartitionPASS: Passage, PassengerPB: Pull Box, Push Button, Panic BarPBD: Particle BoardPBMT: Preshimmed Butyl Mastic Sealant TapePB STA: Push Button StationPC: Pull Chain, Piece, Precast ConcretePCF: Pounds per cubic footPCPL: Portland Cement PlasterPD: Pump Discharge, Plaza DrainPDP: Paneled Door, PaintedPE: Porcelain Enamel, Professional EngineerPED: Pedestal, PedestrianPERF: Perforate, PerformancePERIM: PerimeterPERP: PerpendicularPFN: PrefinishedPG: Pressure GaugePH: Phase, Preheat, PhonePIV: Pivoted, Post Indicator ValvePJF: Preformed Joint FillerPKG: ParkingPKWY: ParkwayPL: Plate, Plan, Property Line, Plastic Laminate, Plastic PLAS: Plaster, PlasticPLAS LAM: Plastic LaminatePLBG: PlumbingPLF: Pounds Per Lineal FootPLG: PlumbingPLMBG: PlumbingPLTF: PlatformPLWD: PlywoodPLYWD: PlywoodPLUMB: PlumbingPNEU: PneumaticPNL: PanelPNT: PaintPOL: Polish, PolishedPORC: PorcelainPORT: PortablePOT W: Potable WaterPP: Plaster, Painted, Power Panel, Precast Panel PR: PairPRC: PrecastPRCST: PrecastPRE: PrefinishedPREFAB: PrefabricatedPRES: PressurePRESS: PressurePRF: PreformedPRFMD: PreformedPRI: PrimaryPRMLD: PremoldedPROT: Protection, ProtectivePRSTR: PrestressedPRTN: PartitionPRV: Pressure Reducing ValvePS: Plumbing StackPSC: Prestressed ConcretePSF: Pounds per square footPSI: Pounds per square inchPSIG: Pounds per square inch gagePT: Paint, Point, Part, Potential TransformerPTC: Post-Tensioned ConcretePTD: Painted, Paper Towel DispenserPTD/R: Combination Paper Towel Dispenser/Receptacle PTN: PartitionPTR: Paper Towel ReceptaclePV: PavingPVC: Polyvinyl ChloridePVF: Polyvinylidene FinishPVG: PavingPVMT: PavementPVT: PrivatePW: Pass WindowPWR: PowerQUAL: QualityQUANT: QuantityQT: Quarry Tile, QuartQTR: QuarterQTY: QuantityR: Riser, Radius, Resistance, Relay PanelR & S: Rod and ShelfRA: Return Air, Registered ArchitectRAD: Radius, RadiatorRADN: RadianRB: Rubber, Rubber Base, Resilient BaseRBC: Rubber Base (Coved),Rubberized Bituminous CompoundRBS: Rubber Base (Straight)RBT: RabbetRCF: Raised Computer FloorRCP: Reflected Ceiling Plan, Reinforced Concrete Pipe RD: Roof Drain, Round, Receptacle Distribution Panel REBAR: Reinforcing BarREC: ReceiverRECEP: ReceptacleRECP: ReceptacleRED: ReducerREF: Refer, Reference, RefrigeratorREFL: Reflected, ReflectorREFR: Refrigerate, RefrigeratorREG: Register, RegularREINF: Reinforcement, or ReinforceREM: Remove, RemovableREQ: Require, RequiredREQD: RequiredRES: ResilientRESIL: ResilientREST: ResistanceRET: Return, RetainingRETG: RetainingREV: Reverse, Revise, RevisionREV DR: Revolving DoorRF: RoofRFG: RoofingRGTR: RegisterRGH: RoughRGH OPNG:Rough OpeningRH: Right Hand, Reheat, Relative HumidityRHC: Reheat CoilRHMS: Round Head Machine ScrewRHR: Right Hand Reverse, ReheaterRHWS: Round Head Wood ScrewRM: RoomRMS: Root Mean SquaredRMV: RemoveRN: Riser NippleRO: Rough OpeningROB: Rod Out BasinROW: Right of WayRPM: Revolutions Per MinuteRPT: Repeat (like " Ditto" )RR: RailroadRT: Rubber Tile, RightRTR/RR Rubber Tread/Rubber RiserRVS: Reverse SideRVT: RivetRW: RedwoodRWC: Rain Water ConductorRWD: RedwoodRWL: Rain Water LeaderS: South, Sealant, Supply, SinkS4S: Surfaced 4 SidesS&M: Surfaced & MatchedS& S: Stained & SealedS&V: Stain & VarnishSACT: Suspended Acoustical TileSALV: SalvageSAN: SanitarySB: Setting Basin, Splash BlockSC: Solid Core, Short Circuit, Self Closing, Sill Cock SCD: Seat Cover DispenserSCFT: Structural Clay Facing TileSCH: ScheduleSCHED: ScheduleSCR: ScreenSCUP: ScupperSCWD: Solid Core WoodSD: Soap DispenserSE: Structural EngineerSEAL: SealantSEC: Second, Section, Secondary, Security System SECT: SectionSECY: SecretarySED: Sewage Ejector DischargeSEL: SelectSERV: ServiceSEV: Sewage Ejector VentSF: Square FootSFGL: Safety GlassSGG: Structural Glazing GasketSGS: Silicone Glazing SealantSH: Shelf, Sheet, ShowerSHR: ShowerSHT: SheetSHTH: SheathingSHTHG: SheathingSHWR: ShowerSIG: SignalSIM: SimilarSJS: Silicone Joint SealantSK: SinkSKL: SkylightSL: Siamese LineSLOT: SlottedSLV: SleeveSND: Sanitary Napkin DispenserSNGG: Sponge Neoprene Glazing GasketSNR: Sanitary Napkin ReceptacleSNT: SealantSP: Soil Pipe, Standpipe, Soundproof, Single PoleSPC: SpacerSPD: Sump Pump DischargeSPDT: Single Pole Double ThrowSPEC: Specification, SpecificationsSPECS: SpecificationsSPK: SpeakerSPL: SpecialSPLR: SprinklerSPM: Sprinkler MainSPP: Skim Coat Plaster PaintedSPST: Single Pole Single ThrowSQ: SquareSS: Stainless Steel, Set Screw, Soil Stack, Service Sink, Slop Sink SSD: Sub-soil DrainSSGS: Silicone Structural Glazing SealantSSK: Service SinkSSS: Silicone Sanitary SealantSST: Stainless SteelST: Straight, Storm WaterSTA: StationSTC: Sound Transmission ClassSTD: StandardSTG: Storage, SeatingSTGG: Structural Glazing GasketSTGR: StaggerSTIFF: StiffenerSTK: StackSTL: SteelSTM: SteamSTO: StorageSTOR: StorageSTP: Standard Temperature & Pressure, Standpipe STR: Straight (re-bars), Strainer, Structural, Starter STRL: StructuralSTRT: StraightSTRUC: StructuralSTRUCT: StructuralST W: Storm WaterSTWY: StairwaySUCT: SuctionSUPP: Supplementary, SupplementSUPT: SuperintendentSUR: SurfaceSUSP: Suspended, SuspendSV: Safety Relief ValveSW: SwitchSWBD: SwitchboardSWGR: SwitchgearSY: Square YardSYM: SymmetricalSYN: SyntheticSYS: SystemT: Tread, Thermostat, TeeT/: TopT&B: Top and BottomT& G: Tongue & GrooveT&P: Temperature & Pressure Relief Valve TAN: TangentTB: Towel BarTC: Top of Curb, TerracottaTCLO: Telephone ClosetTCS: Terne Coated Stainless SteelTD: Trench DrainTEL: TelephoneTEL CL: Telephone ClosetTEMP: Temporary, Tempered, Temperature TEN: TenantTER: TerrazzoTERR: TerrazzoTERM: TerminalTGL: ToggleTH: ThermostatTHK: Thick, ThicknessTHKNS: ThicknessTHR: ThresholdTHRESH: ThresholdTHRM: ThermalTHRMST: ThermostatTHRU: ThroughTKBD: TackboardTL: Twist Lock (receptacle)TLT: ToiletTOL: ToleranceTP: Top of PavementTPD: Toilet paper DispenserTPH: Toilet Paper HolderTPTN: Toilet PartitionTR: Tread, TransomTRANS: Transformer, TranslucentTRAV: TravertineTRD: TreadTS: Time SwitchTSL: Top of SlabTST: Top of SteelTSTAT: ThermostatTT: Terrazzo Tile, Traffic ToppingTTC: Telephone Terminal ClosetTV: TelevisionTW: Top of Wall, Thin Wall (conduit), Tempered Water TYP: TypicalTZ: TerrazzoUC: UndercutUH: Unit HeaterUL: Underwriters' LaboratoriesUNEX: UnexcavatedUNEXC: UnexcavatedUNF: UnfinishedUNFIN: UnfinishedUNO: Unless Noted OtherwiseUON: Unless Otherwise NotedUP: UnpaintedUR: UrinalUSG: United States Gauge, United States Gypsum Company USS: United States StandardUT: UtilityV: Volt, Valve, Vinyl, Vent, VentilatorVA: Volt AmpereVAC: VacuumVACBR: Vacuum BreakerVAR: Varnish, VariesVAT: Vinyl Asbestos TileVB: Vapor Barrier, Valve Box, Vinyl Base, Vacuum Breaker VBC: Vinyl Base (Coved)vbs: Vinyl Base (Straight)VC: Varnished CambricVCP: Vitrified Clay PipeVCT: Vinyl Composition TileVENT: Ventilate, VentilatorVERT: VerticalVEST: VestibuleVF: Vinyl FabricVFGT: Vinyl Foam Glazing TapeVIF: Verify In the FieldVIN: VinylVIT: VitreousVLT: VaultVNR: VeneerVOL: VolumeVP: Vapor Proof, Vent PipeVR: Vapor Retarder, Vacuum Return, Vertical Riser VRM: VermiculiteVS: Vent StackVT: Vinyl TileVTR: Vent Through RoofVWC: Vinyl Wall CoveringW: West, Width, Wide, Watt, Waste, Water, Water Main W/: WithW/O: WithoutW&M: Washburn & Moen GaugeWAINS: WainscotWB: Wood BaseWC: WaterclosetWD: WoodWDP: Wood, PaintedWDSS: Wood, Stained & SealedWDW: WindowWF: Wide Flange (structural steel)WFS: Water Flow SwitchWG: Wired GlassWGL: Wire-GlassWH: Water Heater, Wall Hung, Wall HydrantWI: Wrought IronWIN: WindowWM: Wire Mesh, Water MeterWP: Waterproof, Working Point, Working Pressure, Weatherproof WPR: WaterproofingWPT: Working PointWR: Water Resistant, Water Repellant, Waste Receptacle WRSTP: WeatherstrippingWS: Weatherstripping, Water StopWSCT: WainscotWT: Weight, Water Table, WatertightWVNR: Wood VeneerWW: Window WallWWF: Welded Wire FabricXH: Extra HeavyX HVY: Extra HeavyX STR: Extra StrongYD: YardYR: YearAabbreviation ABBRacoustic ACSTacoustical tile ACT. or AT.adhesive ADD. or ADHadjustable ADJadjustable-trip circuit breaker ATCB aggregate AGGRaileron AILair conditioner A/Cair handler A/Hair tight ATalarm ALMalloy ALYalternating current ACaluminum Alambient AMBAmbulatory Health Care Center AHCC American National Standards Institute ANSI American Wire Gauge AWGammeter A or AMampere A or AMPampere interrupting rating AIR.amps Aanchor bolt ABanode Aantenna ANT.apartment APTappliance APPLapproved APPD or APVDapproximate APPROXapproximately APPROXarchitectural ARCH.architecture ARCH.area Aarea drain ADarmature A or ARM.asphalt ASPHasphalt tile AT.as required ARAssured Equipment GroundingProgram AEGPastragal AAuthority Having Jurisdiction AHJautomatic AU or AUTO automatic sprinkler ASauxiliary AUXavenue AVEazimuth AZBbasement BSMTbathroom Bbathtub BTbattery (electric) BAT.beam BMbearing BRGbearing plate BPL or BRG PL bedroom BRbenchmark BMblack BKblock BLKblocking BLKGblue BLboard BDboard foot BFbonding jumper BJboulevard BLVDbrake relay BRbrass BRSbrick BRKbridge BRDGbronze BRZbrown BRbuilding BL or BLDGbuilding line BLbuilt-up roofing BURbypass BYPCcabinet CAB.cable CACable Antenna Television CATV cantilever CANTILcapacitor CAP.cased opening COcasement CSMTcasing CSGcast iron CIcast-iron pipe CIPcast steel CScast stone CS or CSTcatch basin CBcathode Kceiling CLGcellar CELCelsius °Ccement CEMcement floor CFcenter CTRcenterline CLcenter-to-center C to C centigrade Ccentral processing unit CPU ceramic CERceramic tile CTceramic-tile floor CTFchannel CHANchapter CHchimney CHMcircuit CIR or CKTcircuit breaker CBcircuit interrupter CIcircular mils CMcleanout COclockwise CWcloset CLOcoarse CRScoated CTDcoaxial COAXCode-Making Panel CMPcold air CAcold water CWcolumn COLcompacted COMPconcrete CONCconcrete block CCB or CONC BLK concrete floor CCFconcrete pipe CPcondenser CONDconductor resistivity Kconduit C or CNDconstruction joint CJcontinuous CONTcontour CTRcontrol CONTcontrol joint CJ or CLJcontrol relay CRcontrol relay master CRMcopper Cucorner CORcornice CORcorrugated CORR counterclockwise CCWcounter electromotive force CEMF county COcubic CUcubic foot CU FTcubic foot per minute CFMcubic foot per second CFScubic inch CU IN.cubic yard CU YDcurrent Icurrent transformer CTcut out COcycles per second CPSDdamper DMPRdampproofing DPdead load DLdecibel DBdeck DKdemolition DMLdepth DPdetail DET or DTLdiagonal DIAGdiagram DIAGdiameter D or DIAdimension DIM.dimmer DMRdining room DRdiode DIOdirect current DCdisconnect switch DS。