When building a multi-layered stockpile, materials should be dumped at least how far from the layer edge on subsequent lifts?

When constructing a multi-layered stockpile, it is crucial to maintain proper distance from the edge of the layer when dumping materials. This ensures that the new materials are deposited in a way that promotes stability and prevents the edges from collapsing or becoming too steep. The correct distance of 2 to 4 feet allows for an adequate buffer that helps distribute the weight of the dumped materials, reducing the risk of material slippage and maintaining the integrity of the stockpile.

By following this guideline, you also facilitate better access for machinery that may be used for further handling or transportation of materials, ensuring safety and efficiency in material management. The specified range of 2 to 4 feet strikes a balance between keeping a sufficient distance to avoid overloading the edges while allowing for effective placement of new materials in the stockpile.