Standard sizes:
Thicknesses: 18, 20, 27, 34, 41, 45, 54, 65, 80 and 100 mm
Lengths: 2m, 2m20, 2m50, 3m and 3m50
Width: 25cm and more
– Sound knot allowed less than 20mm.
Admitted with reduction:
one isolated knot less than 15% of board width
Sapwood spoilage only if isolated
sapwood pitting
– Good straightness, with straight grain and regular heartwood
– Uniform colour.
Excluded: lunure, cow’s-tail, decay, between-bark, rolling.
