Construction - Upper, working layer - laminated wood from sawn veneer.  The bottom layer is birch plywood. Technological compensating transverse cuts of the lower layer.

Dimensions:
Thickness (H) - 15 mm (thickness of the lamellae (h1) - 4 mm + plywood - 11 mm)
Width (S) - 90, 120, 150 mm
Length (L) - 600 mm

Processing - Groove with 2 sides, a comb with 2 sides, a facet with 4 sides, grinding the surface.
Humidity - 8 ± 2%
Strength of construction - The ultimate strength for tearing off lamellas is not less than 0.6 MPa

Prime.
The engineering board of the highest category, in which small areas with variations of color tone are possible, and also knots with a diameter of up to 6 mm are allowed, not more than one per linear meter.

Natur.
Classical grade of the engineering board without selection by cutting. The board has a natural pattern of wood, there are tolerable differences in tone. On the engineering board are possible "live" not fallen out knots, in which the diameter is not more than 20 mm.

Rustic.
In this grade of the engineering board dark and light knots are allowed, dropped and putty with a diameter of not more than 60 mm, veins, tilt of fibers. Small cracks shrinkage, which are sealed with a putty under the color of wood and do not spoil the appearance of the board - all these are characteristic features of the rustic variety. Also for this grade, wood changes in color, sapwood in a width of up to 20 mm.