| 摘要 |
In the erection of bridges and other constructions of considerable horizontal length, special framework structures or scaffoldings are used for supporting the shuttering and similar framework for the construction, said framework structures also comprising vertical structures. For dismantling these structures, the vertical structures are mounted on the building construction by means of jacks, whereupon the lowermost parts of the structures are dismantled at ground level. The vertical structures are then successively lowered to be successively dismantled at ground level.
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