§ 33.224. General requirements in shafts being sunk.
(a) After each blast in a shaft, the person in charge of the blast shall insure that all loose material is swept down from the timbers before the workmen descend.
(b) After a suspension of work and after the firing of each blast in a shaft, the cavern foreman shall have the bottom of the shaft examined and tested for gas before the workmen descend and shall keep a record of all findings.
(c) Not more than four persons shall be hoisted or lowered at the same time on a bucket or cage in any shaft. No person shall ride on a loaded bucket at any time. A covered man bucket or cage shall be used for hoisting and lowering men.
(d) Whenever persons are employed on platforms in shafts, the cavern foreman or other person in charge of this work shall insure that all platforms are properly and safety constructed.
(e) No person shall be permitted to do any work in a shaft when drillers or muckers are working at the bottom of a shaft.
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