This grade accepts sapwood, multiple knots, even unhealthy knots, cracks all over the surface of the timber.
It does not accept insect holes and rot.
Density 700 - 750 kg / m3.
"Standard" quality is recommended for those fields 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.