From knot-free spinewood. Beams are produced using spinewood lamellas.
They divides within two categories
Produced from fixed material
Fixed material is made from an especially valuable, thick, round 80 year old tree, mostly from the lower part of the tree trunk. The maximum length is 3 meters.
Produced using finger-jointed material
Finger-joint material is produced using 150 mm to 900 mm long lamellas. Afterwards, we get rid of all possible knots and other imperfections. The necessary height is reached using special machineary that finger-joints the lamellas. Finger-jointed material maximal height is 6.4 meters.