摘要 |
<p>The height adjustable trestle (20) for the erecting of a working platform, for example, has an upper frame (24) height adjustably mounted on pillars (22,23) and interconnected at the top by a cross bar (30). At least one strut member (25,26) of the upper frame and the cross member are rigidly connected by a fastening element (40) yet with play. The cross bar fastened securely on the strut member allows a relative movement of the strut member in relation to the cross bar during the height adjustment.</p> |