S4S planed lumber.
Lumber quality is determined by best face.

False heart is allowed.

The specific characteristics of this grade are strict requirements to assure ability of boards to be used for heavier load capacities. It can be used for manufacturing of dimension components, parquet, FJEG, molding, solid furniture elements and etc.

Special attention is devoted to percentage substitution of slash grain section by allowed defects, which influence on the wood strength. Ranges of unplanned surface are allowed.