30 C.F.R. § 75.1708-1 Surface structures; fireproof construction.
Title 30 - Mineral Resources
Structures of fireproof construction is interpreted to mean structures with fireproof exterior surfaces.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart R—Miscellaneous
§ 75.1708-1 Surface structures; fireproof construction.
