New methodology for Douglas-fir timber qualification

The Do.Na.To project developed a rapid, non-destructive method to assess Douglas-fir roundwood quality using wave speed and moisture content measurements, enabling accurate classification for structural timber applications. Based on data from 158 logs in the Vallombrosa forest, the Hitman HM200 instrument and VISCAN tool were used to predict sawn timber strength and grade logs for optimal use in construction. This end-to-end qualification process enhances the economic value of Douglas fir by identifying the most profitable uses, particularly in beams, boards, and plywood, through precise grading based on origin, growth rate, and silvicultural factors. The method supports sustainable valorisation across the forest wood supply chain.