Abbreviations Abbreviations are commonly used to help simplify a drawing and conserve space. Although many fields share common abbreviation conventions, there are also field- or trades-specific conventions that you will see as you become more specialized. Here is a common list of abbreviations that are used on drawings. Each trade will have specific abbreviations from this list, and therefore a set of drawings will usually include an abbreviation key. structural steel ID inside REF AB anchor bolt diameter ABT about IN inches REQ’D AUX auxiliary required REV INT internal BC bolt circle revision ISO International Standards BBE bevel both ends Org. KP kick plate RF raised face BCD bolt circle diameter RH right hand LH left hand BOE bevel one end SCH schedule LAT lateral BE both ends SI International System of LR long radius BL baseline Units SPECS specifications LG long BM bench mark SQ square MB machine bolt Btm bottom MS mild steel SM seam BP base plate SMLS MIN minimum B/P blueprint MAX maximum seamless BLD blind material S/S seam to MAT’L C/C centre to centre seam SO slip MISC COL column miscellaneous NC on CPLG coupling national SEC section CS carbon steel course NF STD standard C/W complete with national fine SS stainless CYL cylinder NO number steel SYM DIA diameter MOM nominal symmetrical DIAG diagonal NTS not to T top DIM dimension scale T&B top and bottom DWG drawing NPS nominal pipe size T&C threaded and coupled EA each NPT national pipe thread THD threaded EL elevation O/C on centre TBE threaded both ends EXT external OA overall TOE threaded one end F/F face to face OD outside diameter THK thick FF flat face OR outside radius TOL tolerance FLG flange OPP opposite TOC top of concrete FW fillet weld PAT pattern TOS top of steel Ga gauge PBE plain both ends TYP typical Galv POE plain one end U/N unless PSI pounds per square noted VERT HVY heavy inch PROJ project vertical HH hex head RD running WD working drawing HR hot rolled dimension R or Rad WP working point HT heat treatment radius WT weight RND round W/O without HLS holes XH extra heavy HSS hollow
Abbreviations Abbreviations are commonly used to help simplify a drawing and conserve space. Although many fields share common abbreviation conventions, there are also field- or trades-specific conventions that you will see as you become more specialized. Here is a common list of abbreviations that are used on drawings. Each trade will have specific abbreviations from this list, and therefore a set of drawings will usually include an abbreviation key. AB anchor bolt ABT about AUX auxiliary BC bolt circle BBE bevel both ends BCD bolt circle diameter BOE bevel one end BE both ends BL baseline BM bench mark Btm bottom BP base plate B/P blueprint BLD blind C/C centre to centre COL column CPLG coupling CS carbon steel C/W complete with CYL cylinder DIA diameter DIAG diagonal DIM dimension DWG drawing EA each EL elevation EXT external F/F face to face FF flat face FLG flange FW fillet weld Ga gauge Galv HVY heavy HH hex head HR hot rolled HT heat treatment HLS holes HSS hollow structural steel ID inside diameter IN inches INT internal ISO International Standards Org. KP kick plate LH left hand LAT lateral LR long radius LG long MB machine bolt MS mild steel MIN minimum MAX maximum MAT’L material MISC miscellaneous NC national course NF national fine NO number MOM nominal NTS not to scale NPS nominal pipe size NPT national pipe thread O/C on centre OA overall OD outside diameter OR outside radius OPP opposite PAT pattern PBE plain both ends POE plain one end PSI pounds per square inch PROJ project RD running dimension R or Rad radius RND round REF REQ’D required REV revision RF raised face RH right hand SCH schedule SI International System of Units SPECS specifications SQ square SM seam SMLS seamless S/S seam to seam SO slip on SEC section STD standard SS stainless steel SYM symmetrical T top T&B top and bottom T&C threaded and coupled THD threaded TBE threaded both ends TOE threaded one end THK thick TOL tolerance TOC top of concrete TOS top of steel TYP typical U/N unless noted VERT vertical WD working drawing WP working point WT weight W/O without XH extra heavy
3MDrawingObjects.docx