Knots | Shakes | Heart traces | Wane | Rot or dote | |
---|---|---|---|---|---|
Grade 1 A piece is classified as grade 1 when both sides are grade 1 or when one side is grade 1 and the opposite side is grade 2 |
Sound knots are excluded except if smaller than 8 mm | Edge shakes not exceeding 30 mm are permitted on each extremity | Excluded | Excluded | They are excluded, as well as damages due to insects |
Grade 2 A piece is classified as grade 2 when both sides are grade 2 or when one side is grade 2 and the opposite side is grade 3 |
Small or medium sized, in limited number. Rotten or non-intergrown knots are excluded. |
Edge shakes not exceeding 30 mm are permitted on each extremity | Admitted if straight | Admitted on 25% of the length but limited in width and thickness | They are excluded, as well as damages due to insects |
Grade 3 A piece is classified as grade 3 when both sides are grade 3 or when one side is grade 3 and the opposite side is grade 4 |
Medium sized in limited number. Rotten or non-intergrown knots are excluded. |
Edge shakes not exceeding 30 mm are permitted on each extremity | Admitted | Admitted on 25% of the length but limited in width and thickness | Traces of rot are permitted. Pin holes and other insect damages are excluded. |
Grade 4 A piece is classified as grade 4 when both sides are grade 4 |
Knots size must be limited to 1/3 of the width of the piece. Rotten or non-intergrown knots are excluded. |
Edge shakes not exceeding 50 mm are permitted on each extremity | Admitted without limitation | Admitted on 25% of the length but limited in width and thickness | Rot permitted. Pin holes and damages due to insects are excluded, except for non-active galeries. |