| 摘要 |
<p>The invention relates to floor beam comprising two ribs (3), which fix a first and a second flange (1, 2) at a distance from each other, where the two ribs (3) and the first flange (1) make a profile formed in one piece, essentially of U-shape, and that at least one groove (4a) formed in each rib (3) extends in the longitudinal direction of the beam (5).</p> |
