| 摘要 |
<p>The box unit is for use esp. as scaffolding board, a gangway or other working surface. It may be used as a concreting board, or building element. The box unit is made of plywood and has a frame, between top and bottom panels comprising two side, two end, and at least one centre, battens. The side battens (3) and/or centre battens (4) are made of blockboard. At the joints between the end boards (5), side battens and top or bottom plywood panels (1,2) a groove (6), extends out of the frame. It is notched in the head boards by removing material from the head corners lying against the side battens.</p> |
