пиломатериал тангенциальной распиловки

plain sawn timber

Sawn timber that has a face normal or approximately normal to the rays. If rays are not visible, sawn timber that has a face tangential or approximately tangential to the growth rings. Note: Limits depend on the species and on others factors e.g. for oak the angle between the rays and the faces should be between 60 and 90 degrees. Corresponding numbers for species where the rays are not visible are 0 and 30 degrees for the angle between the growth rings and the face. Other limits may be specified in grading rules