| 摘要 |
The specification discloses a telescopic scaffolding structure comprising upper and lower rigid booms each of which comprises a three-dimensional framework. Between the booms are struts which telescopically engage with one of the booms so that the booms may be moved vertically relative to one another by telescopic engagement of the struts with the one boom and without dismantling the struts. Jacks are provided for gripping the struts and members of the booms to effect the telescopic movement. The structure may be mounted on ground wheels for maneuverability. Various arrangements of boom framework are described and the booms may be interconnected by articulated or telescopic braces which articulate or telescope during relative movement of the booms.
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