Grade "AB" Rarely knotty material, knots every 50 cm. Knots are mined from 2 sides no more than 50 cm apart (according to structure). Between knots/defects from each board, at least 70% of the material is obtained without defects on 4 sides. False core, heart line, mold traces from drying rails, cracks, curvature, wane and the presence of sawn boards not in size do not reach. 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
