Trench shoring box unit

Details Trench shoring box unit Trench shoring box unit

E - Fixed Constructions

02

D

254/117

E02D 17/08 (2006.01)

Patent

CA 1271740

9727-6 Abstract of the Disclosure There is described a trench shoring box unit. In known trench shoring box units, walls are provided which consist of a pair of steel plates parallel to each other with U-section spacers between them. The steel plates and the legs of the U-shaped section are spot welded together. Such trench shoring box units have relatively high weight and are costly and time consuming to manufacture. The trench shoring box unit of the present invention has hollow wall elements with internal support webs. When in place the walls are positioned opposite each other and connected with each other by braces of adjustable length. The wall elements are constructed of light- weight metal and when positioned one on top of the other to form one wall, their longitudinal edges interlock with a tongue-and- groove joint and their transverse, or end edges, engage tightly in recesses of lateral shoe bars. The shoe bars, on the side remote from the partition wall elements, have flanges which project beyond the walls and engage in braces.

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