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CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90) > PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES > SUBPART R—Miscellaneous (§75.1700 to §75.1731) > 75.1708-1—Surface structures; fireproof construction.
75.1708-1—Surface structures; fireproof construction.
Structures of fireproof construction is interpreted to mean structures with fireproof exterior surfaces.