RCW 49.24.300
Buckets in vertical shafts.
In all vertical shafts in which hoisting is done by means of a bucket, suitable guides shall be provided when the depth exceeds ten times the diameter or width of the shaft, but in no case shall the maximum depth without guides exceed one hundred and fifty feet. In connection with the bucket, there shall be a crosshead traveling between these guides. The height of the crosshead shall be at least two-thirds of its width, but the height in no case shall be less than thirty inches.
[ 1941 c 194 § 23; Rem. Supp. 1941 § 7666-31.]
Structure Revised Code of Washington
Chapter 49.24 - Health and Safety—Underground Workers.
49.24.020 - Compressed air safety requirements.
49.24.030 - Medical and nursing attendants.
49.24.040 - Examination as to physical fitness.
49.24.080 - Requirements for underground labor.
49.24.100 - Lighting appliances.
49.24.130 - Air chambers—Hanging walks.
49.24.150 - Explosives and detonators.
49.24.160 - Air plant—Feed water.
49.24.170 - Electric power requirements.
49.24.190 - Cars, cages, buckets—Employees riding or walking.
49.24.200 - Speed of vehicles.
49.24.210 - Oil supply restricted.
49.24.220 - Explosives, use of—Blasting.
49.24.230 - Firing switch—Warning by blaster.
49.24.240 - Inspection after blast.
49.24.260 - Requirements as to caissons.
49.24.270 - Shields to be provided.
49.24.280 - Caissons to be braced.
49.24.290 - Cages—Hoisting apparatus.
49.24.300 - Buckets in vertical shafts.
49.24.310 - Telephone system for tunnels.
49.24.320 - Location of lights.
49.24.330 - Generators, transformers, etc., to be grounded.
49.24.340 - Electrical voltage.
49.24.350 - Lamps to be held in reserve.
49.24.360 - Insulators required.