| 摘要 |
<p>A wooden element for building purposes comprises two angled flanges. This element consists of a solid piece of wood which is extracted from one and the same log (9), more precisely by means of a pair of first dividing cuts (10, 10'), which extend substantially radially from the area of the centre of the log in order to define external surfaces on the element, as well as a pair of second dividing cuts (12, 12'), which extend from a spot further out from the centre of the log in order to define interior surfaces of the element. In the finished element, the annual rings in the wooden material are so oriented that imaginary tangents to individual annual rings intersect at least the external surfaces on the element in a substantially right angle to the plane of the surfaces, older annual rings being situated closest to a transition portion between the flanges.</p> |
