Common Lumber Abbreviations and Terms

Common Lumber Abbreviations:
BFBoard feet (1 BF = 1"x 12"x 12")                           
BEVBeveled
BNBull-nosed
BTRBetter
LFLineal feet (per foot)
ComCommon
CLRClear
CVCenter V
DIMDimension
EEdge
FJFinger Jointed
FTFoot (or Feet)
G1SGood One Side
G2SGood Two Sides
GRGreen
INInch
KD Kiln Dried
No.Number
NHNo Hole
PETPrecision End Trimmed
RGHRough
RDMRandom
RL Random lengths
RW Random widths
RLWRandom lengths and widths
S1SSurfaced one side
S2SSurfaced two sides
S4SSurfaced four sides
S1S2ESurfaced one side & two edges   
SESquare Edge
S-GRMore than 19% water by weight (More likely to warp if not installed quickly)
S-DRLess than 19% water by weight (Less likely to warp)
STDStandard
SQSquare
SLShiplap
T&GTounge & Grooved
VGVertical Grain
Species:
CDR    Cedar     
DF    Douglas Fir
DF-LDouglas Fir, Larch
GDFGreen Douglas Fir
HEM    Hemlock, Fir
LP    Lodgepole Pine
RW    Redwood
SPF    Spruce-Pine-Fir
SYP    Southern Yellow Pine
WC    Western Cedar
WRC    Western Red Cedar
WF    White Fir
YP    Yellow Pine
Grades:
#1BTR#1 & Better
#2BTR#2 & Better
#3BTR#3 & Better
B&BB & Better
CON COMConstruction Common Redwood
CON HEARTConstruction Heart Redwood
STD BTRStandard & Better
Common Terms:

Checks: Gaps or separations along the length of a wood member, crossing the annual rings. Caused by rapid shrinkage or uneven seasoning of the wood.

Shake: Shakes are gaps parallel to the annual rings. Unlike checks, shakes occur before the felling of the timber. Caused by uneven stresses along the trunk.

Pitch: Pockets of tree sap. As the lumber cures, the pitch pockets empty or harden leaving an imperfection in the wood.

Knots: Knots occur at the intersection of trunks and branches. Wood grading limits the presence and location of knots in the lumber.

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