- allowed:
- – knots up to max 80 mm
- – open defects up to max 60 mm
- – cracks up to max 400 mm
- – sapwood up to max 25 mm
- – end cracks up to max 150 mm
- – centre core
- – grown defects up to max 10 mm
- – natural color differences
- not allowed:
- – insect damage
- – mechanical defects
- – ingrown bark