This grade accepts a higher percentage of sapwood, multiple sound knots, end cracks twice the width of the piece.
Bad knots larger than 30 mm in diameter, proper heart and sunken shell are graded .
Insect holes and rot are not accepted.
Density 700 - 750 kg / m3.
Standard quality is recommended for those areas where economic efficiency is a priority. It is ideal for making stairs, doors, long elements, etc.
1-2 sound knots, end cracks as wide as the width of the piece and mirrors are acceptable.