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Hexagonal Wire Netting
Gabion
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Gabion Stone

Stone for pitching shall be granite or other clean, hard dense and durable rock free from cracks, kaolinised patches, organic or other impurities.

The dimension of each stone measured perpendicular to the face of the pitching shall not be less than 225mm. The exposed face of each stone shall not be less than 0.02m2 in area.

Stone shall be hand placed with closed joints on a layer of gravel or crushed stone to a minimum finished thickness of 25mm or according to customer's requirements.

The sides of stones shall be roughly trimmed with a spalling hammer to obtain a reasonably close fit and the interstices filled with clean coarse aggregate or gravel well rammed and wedged with spalls. The finished pitching shall show an even surface to the lines and levels or according to customer's requirements.

The joints in pitching should be raked out to a depth of at least 50mm and sealed with 1:2 cement/sand mortar finished neatly flushed with the surrounding stones. The stones shall be left clean of all mortar and stains.

Measurement of pitching shall be made by the square meter of surface pitched on otherwise stated in the Bill of Quantities. The rates for pitching shall apply whether the surface to be pitched is level or inclined.

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