From Visual Grading and Dynamic Modulus of European Beech (Fagus sylvatica) Logs to Tensile Strength of Boards

The aim of the present paper is to assess non-destructive indicating properties Slovenian beech (Fagus sylvatica) logs and correlate them with mechanical final product, which boards. Beech were visually graded according standard procedure vibrational frequencies measured. Logs further on sawn into boards also non-destructively tested in wet dry conditions. Finally, experimentally tension. Special focus was directed towards visual parameters their influence overall quality output material. longitudinal natural studied as potential properties. results showed that a majority log grading do not result good timber terms strength stiffness properties, only few are decisive for classification. coefficient determination static MOE vs. dynamic r2=0.13, whereas r2=0.49. Using characteristics combination measurements could help increase yield high wood.