| 摘要 |
In order to reduce its weight, a lining board (1) has at its edges, instead of hollow sections, flat marginal strips (3) that project perpendicularly to the lining skin (2) and that have, in order to increase their stiffness, an area (5) that extends back to the middle of the lining board (1), arranged between their two mutually aligned longitudinal edges (6, 7) that act as a support for the marginal strip (3) of an adjacent lining board (1). In that recessed area (5) are formed flutes or beads (8) that extend in the opposite direction and that are open towards the centre of the lining board. A flat, highly resistant marginal strip (3) is thus obtained, whose beads (8) may be engaged by usual clamps or clips, dispensing with heavy-weight hollow marginal sections.
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