Surfaced Three Sides (“S3S”)

The abbreviation “S3S” is a description of finish, usually pertaining to hardwood species. It stands for “Surfaced Three Sides”, which indicates that two faces have been planed, and one edge has been processed with a “straight-line” rip saw, rendering the edge straight and smooth. The fourth edge is left rough. Many of our “S3S” materials are “S2S1E”, meaning surfaced on two sides and one edge, leaving the second edge rough.