Swedish Wood and Svenskt Trätekniskt Forum have together with the Association of Finnish Sawmillmen and Treindustriens Tekniske Forening in Norway worked out a new system of rules regarding grading of sawn timber named Commercial Grading of Timber.

The new Commercial Grading of Timber has been produced through a careful examination of the figures used in previous grading rules, and revision of these figures based on production- and market-related requirements. An additional basis for the new grading system was a series of test gradings that compared the different sets of rules.