Lumber - Surface Finishing

Lumber and surface finishing abbreviations reference guide

Lumber - Surface Finishing

Lumber and surface finishing abbreviations and their meanings.

surface finishing lumber

AbbreviationSurface Finishing Description
S1SSmooth surface, one side
S1S1ESmooth surface, one side, one end
S1S2ESmooth surface, one side, two ends
S2SSmooth surface, two sides
S2S1ESmooth surface, two sides, one end
S2S2ESmooth surface, two sides, two ends
S3SSmooth surface, three sides
S3S1ESmooth surface, three sides, one end
S3S2ESmooth surface, three sides, two ends
S4SSmooth surface, four sides
S4S1ESmooth surface, four sides, one end
S4S2ESmooth surface, four sides, two ends
R/EResawn (same as S1S or S1S2E)
R/O or R/SRough sawn (no smooth surfaces)
CMCenter matched
D & MDressed and matched
T & GTongue and grooved
EV1SEdge vee on one side
S1ESurfaced one edge