30 C.F.R. § 57.11037 Ladderway openings.
Title 30 - Mineral Resources
Ladderways constructed after November 15, 1979, shall have a minimum unobstructed cross-sectional opening of 24 inches by 24 inches measured from the face of the ladder.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart J—Travelways and Escapeways
Travelways—Underground Only
§ 57.11037 Ladderway openings.
