| 摘要 |
<p>The plate has a core and an upper plate (12) that is provided above the core and made of steel. The core is made by juxtaposition of wood e.g. oak, boards (110). Longitudinal edges (111) of the boards and direction of wood fibers are oriented in a direction perpendicular to that of a carriageway. Lower connection bars and upper bars (14) form a complete circle around the core and are distributed along the length of the plate. The connection bars are distributed along a lower side of the plate. The plate has length of 1.5 to 2.5 meters.</p> |
