Manufactured from the logs that are 40-55 cm in diameter, divided into three lengths:
- 206 - 255 (doors)
- 256 - 309 (short panels)
- 310< (long panels).
- A+ (pure veneer, no errors, light uniform colour, width: 15<, frieze, half-crown and at least 3 bundles of cathedral-textured crown)
- A (ighter in colour, bundles with one coloured knot per longitudinal meter, width:12<, frieze, half-crown and at least 3 bundles of cathedral-textured crown)
- A/B (bundles with slight discolouration and wood-coloured knots, width: 10<, frieze, half-crown and at least 3 bundles of regular textured crowns)
- B (bundles with strong darker veins and knots, width: 9<, frieze, half-crown, crown, with longitudinal mirror up to 1/2 the bundle width)