Wavy wooden element (5, 6, 7, 8, 9, 10, 11, 12) that is composed of glued wood fibers, the wooden element (5, 6, 7, 8, 9, 10, 11, 12) has platelet-shaped regions (20, 30) which are arranged in a zigzag shape, wherein a zig region of the element forms with an adjacent zag region of the element a common edge (1', 2', 3', 4') between them such that the wooden element (5, 6, 7, 8, 9, 10, 11, 12) is zigzag-shaped, wherein (a) the platelet-shaped regions of the wooden element are plane surfaces (20, 30) and the edge formed between the plane surfaces is a plane surface, the wave of the wavy element has both a positive and negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are plane surfaces (20, 30) and the edge formed between the plane surfaces is a plane surface, the wave of the wavy element has only positive half-waves in the mathematical sense; or (b) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a curved surface, preferably a convex surface, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a curved surface, preferably a convex surface, the wave of the wavy element has only positive half-waves in the mathematical sense; or (c) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is straight, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is straight, the wave of the wavy element has only positive half-waves in the mathematical sense; or (d) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a plane surface, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a plane surface, the wave of the wavy element has only positive half-waves in the mathematical sense; characterized in that the length of the wood fibers in the wooden element (5, 6, 7, 8, 9, 10, 11, 12) is at least twice as long as the thickness of a zig-shaped region or a zag-shaped region. (a) the platelet-shaped regions of the wooden element are plane surfaces (20, 30) and the edge formed between the plane surfaces is a plane surface, the wave of the wavy element has both a positive and negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are plane surfaces (20, 30) and the edge formed between the plane surfaces is a plane surface, the wave of the wavy element has only positive half-waves in the mathematical sense; or (b) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a curved surface, preferably a convex surface, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a curved surface, preferably a convex surface, the wave of the wavy element has only positive half-waves in the mathematical sense; or (c) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is straight, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is straight, the wave of the wavy element has only positive half-waves in the mathematical sense; or (d) the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a plane surface, the wave of the wavy element has both a positive and a negative half-wave in the mathematical sense; or the platelet-shaped regions of the wooden element are curved surfaces (20, 30) and the edge formed between the curved surfaces is a plane surface, the wave of the wavy element has only positive half-waves in the mathematical sense;