§ 75.1711-2. Sealing of slope or drift openings.
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/us/cfr/t30/s§ 75.1711-2·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Slope or drift openings required to be sealed under § 75.1711 shall be sealed with solid, substantial, incombustible material, such as concrete blocks, bricks or tile, or shall be completely filled with incombustible material for a distance of at least 25 feet into such openings.
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§ 75.1711-2
Sealing of slope or drift openings.
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