Scheduled maintenance - Thursday, July 12 at 5:00 PM EDT
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How material should be stockpiled depends on the nature of the material itself. The overall goal is to create a stockpile that is stable. This stability will depend on many conditions, including:
Examples of loose material include sand, gravel, salt, slag, etc.
There may be certain regulated requirements, or other aspects (such as the height and angle of repose) may need to be determined by a professional engineer or inspected by a competent person – check with your jurisdiction for exact requirements.