Answer / Malvika Prajapati

Calculating the quantity of random rubble masonry for a retaining wall involves several steps:
1. Determine the area and height of the retaining wall.
2. Choose an appropriate factor for the depth of the backfill (usually around 1.5 times the height).
3. Calculate the volume of the wall and backfill using the formula: Volume = Length * Width * Height.
4. Determine the volume of stone required based on the density of the rubble masonry, which is typically around 1500-2000 kg/m³.
5. Convert the volume to weight and then to quantity (number of tonnes) for ordering purposes.

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