| 摘要 |
<p>The element has boards (1-3) that are aligned and arranged parallel to each other, where outer layers of the boards are oriented normal to an axis of expected bending loads. Rings (1.1) lie in a timber side of the boards that lie at a pressure side of the expected bending loads at a pressure side for a plane of the bending loads at an acute angle of 45 degrees. An outer layer at a discharge side formed by one of the boards is thicker than a stretch-side outer layer formed by the other board. A middle layer of the board is made of timber with low strength.</p> |
