| 摘要 |
<p>Lattice girder (1) comprises at least two booms (2-5) running in the longitudinal direction and held a distance apart by struts (6, 7). At least two of the struts cross each other at a crossing point (8) and are connected to each other at this crossing point by a hub (9). The hub has on at least one free side a flat region (10) for a marking (12) which is surrounded by a rim protruding from the plane of the region. Preferred Features: The lattice girder is made of aluminum and the struts are welded onto the hub. The marking is an engraving or imprint.</p> |
