MSHA - Code of Federal Regulations - 30 CFR 56.3400
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MSHA - Title 30 CFR
30 CFR § 56.3400
Secondary breakage.


Prior to secondary breakage operations, material to be broken, other than hanging material, shall be positioned or blocked to prevent movement which would endanger persons in the work area. Secondary breakage shall be performed from a location which would not expose persons to danger.