Grade А
All four sides are clean, without decay.
Grade AA/AB
Small live knots up to 12 mm in diameter are allowed, one piece per one linear meter of the board. Presence of two uprights 120*2200 mm.
Grade В
One side is clean and 4 sides adjacent to it are 50% clean. Used for the manufacture of surfaces of tables, stairs, chairs, furniture, floors, etc.
Grade С
Small live knots up to 60 mm, up to four pieces per linear meter, and black knots up to 30 mm, up to two pieces per linear meter.
22-54
Grade А
All four sides are clean, without decay.
Grade АA/AB
Small live knots up to 12 mm in diameter are allowed, one piece per one linear meter of the board. Presence of two uprights 120*2200 mm.
Grade В
One side is clean and 4 sides adjacent to it are 50% clean. Used for the manufacture of surfaces of tables, stairs, chairs, furniture, floors, etc.
Grade С
Small live knots up to 60 mm, up to four pieces per linear meter, and black knots up to 30 mm, up to two pieces per linear meter.
Grade А
All four sides are clean, without decay.
Grade АA/AB
Small live knots up to 12 mm in diameter are allowed, one piece per one linear meter of the board. Presence of two uprights 120*2200 mm.
Grade В
One side is clean and 4 sides adjacent to it are 50% clean. Used for the manufacture of surfaces of tables, stairs, chairs, furniture, floors, etc.
Grade С
Small live knots up to 60 mm, up to four pieces per linear meter, and black knots up to 30 mm, up to two pieces per linear meter.
