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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 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES > SUBPART T—Slope and Shaft Sinking (§77.1900 to §77.1916) > 77.1913—Fire-resistant wood.
77.1913—Fire-resistant wood.
Except for crossties, timbers, and other wood products which are permanently installed in slopes and shafts, shall be fire resistant.