Chalkboard CHBD
Check CHK
Chilled Water Supply CHS
Ceiling Height CHT
Cast Iron CI
Curb Inlet CI
Cinder Block CIN BLK
Cast Iron Pipe CIP
Cast-In-Place CIP
Concrete-In-Place CIP
Circle CIR
Circuit (Electrical) CIR, CKT
Circuit Breaker CIR BKR
Circumference CIRC
Ceiling Joist CJ
Control Joint CJ, CJT
Calk (ing), Caulk (ing) CK
Cladding CLDG
Ceiling CLG, CLNG
Ceiling Diffuser CLG DIFF
Ceiling Grille CLG GRL
Ceiling Height CLG HT
Contract Limit Line CLL
Clear CLR
Closure CLS
Centimeter (s) CM
Ceramic Mosaic Tile CMT
Concrete Masonry Unit CMU
Conduit CND
Counter CNTR
Carbon Monoxide CO
Certificate of Occupancy CO
Cleanout (Plumbing) CO
Column COL
Combination COMB
Composition COMP
Compress (ed), (ion), (ible) COMP
Compartment COMPT
Composition, (Composite) COMPO
Condenser COND
Concrete CONC
Construction CONSTContinue, Continuous CONT
Contract (or) CONTR
Corrugated CORR,CORRUG
Carpet and Pad C&P
Concrete Pipe CP
Control Panel CP
Copper CPR
Cycles Per Second CPS
Carpet (ed) CPT
Chromium (Plated) CR
Cross Grain CRG
Course (s) CRS
Cast Stone CS
Control Switch CS
Countersink CS
Casing CSG
Construction Standards Institute CSI
Counter Sunk CSK
Casement CSMT
Cast Stone CST
Casework CSWK
Ceramic Tile CT
Coated CTD
Ceramic Tile Floor CTF
Center CTR, CNTR
Contour CTR
Counter CTR
Control CTRL
Copper CU
Cubic CU
Cubic Foot (Feet) CU FT (ft3), CFT
Cubic Inch(es) CU IN (in3)
Cubic Yard(s) CU YD (yd3), CYD
Check Valve CV, CKV
Casement Window CW
Clockwise CW
Cold Water CW
Cold Water Riser CWR
Connection CX
Cross Bracing XBRA
Dryer D
Drain DAcronyms/Abbreviations 303