AB (V&BTR):

V and better sawn timber graded according to the Nordic Timber Grading Rules. Small sound knots, small dead and loose ones, and shallow surface fissures are permitted. Wane, rot, insect damage, large bark pockets and blue stain exceeding 5% of the timber’s surface are not permitted.

SF (ABC) :

VI and better sawn timber graded according to the Nordic Timber Grading Rules. Sound knots are not restricted, small dead and loose knots, surface fissures and fissures going through the thickness at the ends of the timber up to the width of the board in length are allowed, ingrown bark and scarring is limited to 300mm in length and log blue stain limited to 15% of the surface of timber. Rot and insect damage are not permitted.

C (VI) :

VI sawn timber graded according to the Nordic Timber Grading Rules. Sound knots are not restricted, small dead and loose knots, surface fissures and fissures going through the thickness at the ends of the timber up to the width of the board in length are allowed, ingrown bark and scarring is limited to 300mm in length and log blue stain limited to 15% of the surface of timber. Rot and insect damage are not permitted. Unlike SF (ABC), this grade does not include timber with AB (V and better) quality.

SH (SCHAAL) :

SCHAALBOARD sawn timber graded according to the Nordic Timber Grading Rules. This is a special side board grade that allow wane on up to 75% of any surface, unrestricted in length. Other quality requirements are the same as for class C (VI).

D (VII) :

VII sawn timber graded according to the Nordic Timber Grading Rules. The entire length of the timber must be touched by the saw on all sides, the timber must hold together to its full length. Wood defects are not restricted. There is no material in the class that meets the requirements of C (VI).

           

Files:

Standard specification and grade descriptions;