Grade "BB" Multi knot material. Material without false core and heart line. There are no large knots and other defects that affect the resistance of the board to cracks, wane and the presence of boards sawn out of size. Length: 1,5 - 3 m with pace 300 or 500 mm. The prevailing length is 3 m. Width: 70-150 mm with any pace (the material can be cut with fixed widths 75;100;125;150 mm or other fixed widths) Thickness: 25 mm. Thickness tolerance: -0+2 mm Width tolerance: -0+2 mm
