30 C.F.R. § 57.11010 Stairstep clearance.
Title 30 - Mineral Resources
Vertical clearance above stair steps shall be a minimum of seven feet, or suitable warning signs or similar devices shall be provided to indicate an impaired clearance.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart J—Travelways and Escapeways
Travelways—Surface and Underground
§ 57.11010 Stairstep clearance.
