"Standard" quality is recommended for those areas where economic efficiency has priority. It is ideal for making stairs, doors, long elements, etc. 1-2 healthy knots, end cracks as wide as the width of the piece and mirrors are accepted.
Rustic quality accepts multiple sound knots, end cracks twice the width of the piece.
Spurious knots larger than 30 mm in diameter, proper heart and sunken bark are bonus
Insect holes and rot are not accepted.
Density 720 kg/m3.