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Abbreviations
Misc.
ml
M.L.F.
Mo.
Mobil.
Mog.
MPH
MPT
MRGWB
Miscellaneous
Milliliter, Mainline
Thousand Linear Feet
Month
Mobilization
Mogul Base
Miles per Hour
Male Pipe Thread
Moisture Resistant Gypsum
Wallboard
MRT
Mile Round Trip
ms
Millisecond
M.S.F.
Thousand Square Feet
Mstz.
Mosaic & Terrazzo Worker
M.S.Y.
Thousand Square Yards
Mtd., mtd., mtd Mounted
Mthe.
Mosaic & Terrazzo Helper
Mtng.
Mounting
Mult.
Multi; Multiply
M.V.A.
Million Volt Amperes
M.V.A.R.
Million Volt Amperes Reactance
MV
Megavolt
MW
Megawatt
MXM
Male by Male
MYD
Thousand Yards
N
Natural; North
nA
Nanoampere
NA
Not Available; Not Applicable
N.B.C.
National Building Code
NC
Normally Closed
NEMA
National Electrical Manufacturers
Assoc.
NEHB
Bolted Circuit Breaker to 600V.
NFPA
National Fire ProtectionAssociation
NLB
Non-Load-Bearing
NM
Non-Metallic Cable
nm
Nanometer
No.
Number
NO
Normally Open
N.O.C.
Not Otherwise Classified
Nose.
Nosing
NPT
National Pipe Thread
NQOD
Combination Plug-on/Bolt on
Circuit Breaker to 240V.
N.R.C., NRC
Noise Reduction Coefficient/
Nuclear Regulator Commission
N.R.S.
Non Rising Stem
ns
Nanosecond
nW
Nanowatt
OB
Opposing Blade
OC
On Center
OD
Outside Diameter
O.D.
Outside Dimension
ODS
Overhead Distribution System
O.G.
Ogee
O.H.
Overhead
O&P
Overhead and Profit
Oper.
Operator
Opng.
Opening
Orna.
Ornamental
OSB
Oriented Strand Board
OS&Y
Outside Screw and Yoke
OSHA
Occupational Safety and Health
Act
Ovhd.
Overhead
OWG
Oil,Water or Gas
Oz.
Ounce
P.
Pole;Applied Load; Projection
p.
Page
Pape.
Paperhanger
P.A.P.R.
Powered Air Purifying Respirator
PAR
Parabolic Reflector
P.B., PB
Push Button
Pc., Pcs.
Piece, Pieces
P.C.
Portland Cement;Power Connector
P.C.F.
Pounds per Cubic Foot
PCM
Phase Contrast Microscopy
PDCA
P.E., PE
P.E.C.I.
Perf.
PEX
Ph.
P.I.
Pile.
Pkg.
Pl.
Plah.
Plas.
plf
Pluh.
Plum.
Ply.
p.m.
Pntd.
Pord.
pp
PP, PPL
P.P.M.
Pr.
P.E.S.B.
Prefab.
Prefin.
Prop.
PSF, psf
PSI, psi
PSIG
PSP
Pspr.
Psst.
P.T.
P. & T.
Ptd.
Ptns.
Pu
PVC
Pvmt.
PRV
Pwr.
Q
Qt.
Quan., Qty.
Q.C.
r
R
R.C.P.
Rect.
recpt.
Reg.
Reinf.
Req’d.
Res.
Resi.
RF
RFID
Rgh.
RGS
RHW
rms
Rnd.
Rodm.
Rofc.
Rofp.
Rohe.
Rots.
R.O.W.
RPM
R.S.
Rsr
RT
S.
SBS
Painting and Decorating
Contractors of America
Professional Engineer;
Porcelain Enamel;
Polyethylene; Plain End
Porcelain Enamel on Cast Iron
Perforated
Cross linked polyethylene
Phase
Pressure Injected
Pile Driver
Package
Plate
Plasterer Helper
Plasterer
Pounds Per Linear Foot
Plumbers Helper
Plumber
Plywood
Post Meridiem
Painted
Painter, Ordinary
Pages
Polypropylene
Parts per Million
Pair
Pre-engineered Steel Building
Prefabricated
Prefinished
Propelled
Pounds per Square Foot
Pounds per Square Inch
Pounds per Square Inch Gauge
Plastic Sewer Pipe
Painter, Spray
Painter, Structural Steel
Potential Transformer
Pressure & Temperature
Painted
Partitions
Ultimate Load
Polyvinyl Chloride
Pavement
Pressure Relief Valve
Power
Quantity Heat Flow
Quart
Quantity
Quick Coupling
Radius of Gyration
Resistance
Reinforced Concrete Pipe
Rectangle
receptacle
Regular
Reinforced
Required
Resistant
Residential
Radio Frequency
Radio-frequency identification
Rough
Rigid Galvanized Steel
Rubber, Heat & Water Resistant;
Residential Hot Water
Root Mean Square
Round
Rodman
Roofer, Composition
Roofer, Precast
Roofer Helpers (Composition)
Roofer,Tile & Slate
Right of Way
Revolutions per Minute
Rapid Start
Riser
Round Trip
Suction; Single Entrance; South
Styrene Butadiere Styrene
SC
SCFM
Scaf.
Sch., Sched.
S.C.R.
S.D.
SDR
S.E.
Sel.
SER, SEU
S.F.
S.F.C.A.
S.F. Flr.
S.F.G.
S.F. Hor.
SFR
S.F. Shlf.
S4S
Shee.
Sin.
Skwk.
SL
S.L.
Sldr.
SLH
S.N.
SO
S-O-L
sp
S.P.
Spri.
spwg
S.P.D.T.
SPF
S.P.S.T.
SPT
Sq.
Sq. Hd.
Sq. In.
S.S.
S.S.B.
sst, ss
Sswk.
Sswl.
St.; Stl.
STC
Std.
Stg.
STK
STP
Stpi.
Str.
Strd.
Struct.
Sty.
Subj.
Subs.
Surf.
Sw.
Swbd.
S.Y.
Syn.
S.Y.P.
Sys.
t.
T
Tan
T.C.
T&C
T.D.
Tdd
T.E.M.
temp
TFFN
Screw Cover
Standard Cubic Feet per Minute
Scaffold
Schedule
Modular Brick
Sound Deadening
Standard Dimension Ratio
Surfaced Edge
Select
Service Entrance Cable
Square Foot
Square Foot Contact Area
Square Foot of Floor
Square Foot of Ground
Square Foot Horizontal
Square Feet of Radiation
Square Foot of Shelf
Surface 4 Sides
Sheet Metal Worker
Sine
Skilled Worker
Saran Lined
Slimline
Solder
Super Long Span Bar Joist
Solid Neutral
Stranded with oil resistant inside
insulation
Socketolet
Standpipe
Static Pressure; Single Pole; SelfPropelled
Sprinkler Installer
Static Pressure Water Gauge
Single Pole, Double Throw
Spruce Pine Fir; Sprayed
Polyurethane Foam
Single Pole, Single Throw
Standard Pipe Thread
Square; 100 Square Feet
Square Head
Square Inch
Single Strength; Stainless Steel
Single Strength B Grade
Stainless Steel
Structural Steel Worker
Structural Steel Welder
Steel
Sound Transmission Coefficient
Standard
Staging
Select Tight Knot
Standard Temperature & Pressure
Steamfitter, Pipefitter
Strength; Starter; Straight
Stranded
Structural
Story
Subject
Subcontractors
Surface
Switch
Switchboard
Square Yard
Synthetic
Southern Yellow Pine
System
Thickness
Temperature;Ton
Tangent
Terra Cotta
Threaded and Coupled
Temperature Difference
Telecommunications Device for
the Deaf
Transmission Electron Microscopy
Temperature,Tempered,Temporary
Nylon Jacketed Wire
873