| 摘要 |
<p>A duckboard comprises a plurality of long narrow, parallel bars (3, 4) which are kept at a distance from each other by means of short, spaced-apart spacing elements (6), the bars being inter-connected via transverse tie rods (5) which extend through holes in the bars as well as the spacing elements. According to the invention, nearby wooden bars (3, 4) have a cross-section-wise I-shape and two flute-shaped countersinks (8) opening towards opposite directions from a central web (9), which countersinks are delimited by upper and lower flanges (10) which are thicker than the web, the individual spacing element (6) having two opposite side projections (11), which have a cross-section shape that is congruent with the cross-section shape of the countersinks of the bars and which engage the same countersinks.</p> |
