Common Abbreviations in Construction Blueprints

a construction blueprint
••• Pixabay cocoparisienne

Construction blueprints, also called construction plans or drawings, are full of abbreviations and acronyms to save space and neaten the overall appearance. Remembering all of these can be tricky, and this is on top of the challenge of reading all the symbols and deciphering the conventions used by a particular draftsperson or designer. Fortunately, many blueprint abbreviations have widely accepted meanings and are used in all sorts of blueprints, from framing plans to engineering drawings.

  • A/C: Air Conditioner
  • ACI: American Concrete Institute
  • ADA: Americans with Disabilities Act of 1992
  • A.F.F.: Above Finished Floor
  • A.F.G.: Above Finished Grade
  • AIA: American Institute of Architects or American Insurance Association
  • AIEE: American Institute of Electrical Engineers
  • AISC: American Institute of Steel Construction
  • ASCE: American Society of Civil Engineers
  • ASME: American Society of Mechanical Engineers
  • ASTM: American Society for Testing and Materials
  • AWG: American Wire Gauge
  • BOT: Bottom
  • B.O.F.: Bottom of Footing
  • B.O.M: Bill of Material
  • B.O.W.: Bottom of wall
  • BRZ: Bronze
  • BV: Butterfly Valve
  • CAD: Cadmium or Computer-Aided Drafting
  • C.C.: Center to Center
  • C.D.: Construction document
  • C.F.M.: Cubic Feet per Minute
  • CFS: Cubic Feet per Second
  • C.I.: Cast Iron
  • CL.: Closet
  • CLG.: Ceiling
  • CMU: Concrete Masonry Unit
  • C.O.: Cleanout
  • CONT.: Continuous
  • CU. FT.: Cubic Feet
  • CU. YD.: Cubic Yard
  • D.S.: Downspout
  • DIA.: Diameter
  • DIM.: Dimension
  • DN.: Down
  • DP: Damp-proofing, Dew Point or Distribution Panel
  • DWG: Drawing
  • EA.: Each
  • E.F.: Exhaust fan
  • EXC: Excavate
  • E.W.: Each way
  • EXT.: Exterior
  • FACP: Fire Alarm Control Panel
  • F.C.O.: Floor cleanout
  • F.D.: Floor drain
  • FIN.: Finish
  • F.F.L.: Finished floor level
  • FRPF: Fireproof
  • GALV.: Galvanized
  • G.C.: General Contractor
  • G.F.C.I. or G.F.I.: Ground-Fault Circuit-Interrupter
  • GPM: Gallons Per Minute
  • G.T.: Glazed Tile
  • GYP.: Gypsum
  • H.B.: Hose Bib
  • HDCP: Handicapped (better if referred to as "Accessible")
  • HV: High Voltage
  • H.V.A.C.: Heating, Venting and Air Conditioning
  • H.W.: Hot water
  • IE: Invert Elevation
  • IN: Inch
  • INSUL.: Insulation
  • INT.:Interior
  • INV: Invert
  • J-Box: Junction box
  • JCT.: Junction
  • JST.: Joist
  • KW: Kilowatt
  • LFT.: Linear feet
  • LL: Live Load
  • LT.: Light
  • LTG.: Lighting
  • L.V.L.: Laminated Veneer Lumber
  • MH: Manhole
  • MAS.: Masonry
  • MTL.: Material
  • MFG.: Manufacturing
  • MIN.: Minimum
  • NEC: National Electrical Code
  • N.I.C.: Not In Contract
  • N.T.S.: Not to scale
  • O.C.: On center
  • O.D.: Outside diameter
  • OPNG.: Opening or Rough Opening
  • PCC: Portland Cement Concrete
  • PL.: Plaster
  • P.L.: Property line
  • PLYWD.: Plywood
  • P.S.F.: Pounds per square foot
  • P.S.I.: Pounds per square inch
  • PTD: Painted
  • RC: Reinforced Concrete
  • RD: Roof Drain, Round, or Receptacle Distribution Panel
  • R.D.L.: Roof drain leader
  • REBAR: Reinforcing Bar
  • R.O.: Rough Opening
  • R.O.W.: Right of way
  • REINF.: Reinforced
  • SAN.: Sanitary
  • S.D.: Smoke detector
  • SECT.: Section
  • SHT.: Sheet
  • SHT'G.: Sheathing
  • SPECS.: Specifications
  • SQ.FT.: Square feet
  • SQ. IN.: Square inches
  • SS: Stainless Steel, Setscrew, Soil Stack, Service Sink, or Slop Sink
  • STD.: Standard
  • STL.: Steel
  • S.Y.: Square yard
  • T&B: Top and Bottom
  • T&G: Tongue and Groove
  • T.O.: Top of
  • T.O.B.: Top of Beam
  • T.O.C.: Top of Curb or Top of Concrete
  • T.O.F.: Top of Footing
  • T.O.J.: Top of Joist
  • T.O.M.: Top of Masonry
  • T.O.W.: Top of Wall
  • TTC: Telephone Terminal Closet
  • UON: Unless Otherwise Noted
  • V.B.: Vapor Barrier
  • V.I.F.: Verify in Field
  • VA.: Voltage
  • W.C.: Water Closet (toilet)
  • WD.: Wood
  • WDW.: Window
  • W.I.: Wrought Iron
  • W.I.C.: Walk-In Closet
  • WL: Water Level
  • WP.: Weatherproof
  • WS: Weatherstripping or Water Stop
  • WT.: Weight
  • WTR. HTR.: Water Heater
  • W/O: Without