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Sack gabion Installation and Filling
Rocks for Sack Gabions may be produced by any suitable quarrying method, and by the use of any device that yields the required sizes within the gradation limits chosen. Rocks shall be hard, angular to round, durable and of such quality that they shall not disintegrate on exposure to water or weathering during the life of the structure. Rocks shall range between 100 mm and 200 mm. The range in sizes may allow for a variation of 5% oversize and/or 5% undersize rock, provided it is not placed on the exposed surface. In all cases, the oversize rock shall not be larger than 250 mm, and the undersize rock shall not be smaller than 80 mm.
Rock shall be placed from the open end of the cylindrical shaped gabion. Once the Sack Gabion has been filled satisfactory, the ends of the top spiral wire are pulled tight, twisted and looped onto itself. Care shall be taken when placing the stone to avoid damaging the wire coating. Hand manipulation of the rock may be necessary to minimise voids and achieve a maximum density of the rock in the Sack Gabion.

 



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