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Lumber - Surface Finishing

Lumber and surface finishing abbreviations.

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surface finishing lumber

Abbreviation ExamplesSurface Finishing
S1S Smooth surface, one side
S1S1E Smooth surface, one side, one end
S1S2E Smooth surface, one side, two ends
S2S Smooth surface, two sides
S2S1E Smooth surface, two sides, one end
S2S2E Smooth surface, two sides, two ends
S3S Smooth surface, three sides
S3S1E Smooth surface, three sides, one end
S3S2E Smooth surface, three sides, two ends
S4S Smooth surface, four sides
S4S1E Smooth surface, four sides, one end
S4S2E Smooth surface, four sides, two ends
R/E Resawn (same as S1S or S1S2E)
R/O or R/S Rough sawn (no smooth surfaces)
CM Center matched
D & M Dressed and matched
T & G Tongue and grooved
EV1S Edge vee on one side
S1E Surfaced one edge
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