30 C.F.R. § 77.1912 Ladders and stairways.
Title 30 - Mineral Resources
(a) Substantial stairways or ladders shall be used during the construction of all shafts where no mechanical means are provided for men to travel. (b) Landings at intervals of not more than 30 feet shall be installed. (c) Shaft ladders shall project 3 feet above the collar of the shaft, and shall be placed at least 3 inches from the side of the shaft.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart T—Slope and Shaft Sinking
§ 77.1912 Ladders and stairways.
