30 CFR 57.4660 - Work in shafts, raises, or winzes and other activities involving hazard areas.
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During performance of an activity underground described in Table C-2 or when falling sparks or hot metal from work performed in a shaft, raise, or winze could pose a fire hazard—
(a) A multipurpose dry-chemical fire extinguisher shall be at the worksite to supplement the fire extinguishing equipment required by § 57.4600; and
(1) Wet down the area before and after the operation, taking precaution against any hazard of electrical shock.
|Welding or cutting with an electric arc or open flame||More than 1 gallon of combustible liquid, unless in a closed, metal container.|
|Using an open flame to bend or heat materials||Within 35 feet of—||More than 50 pounds of non-fire-retardant wood.|
|Thawing pipes electrically, except with heat tape||More than 10 pounds of combustible plastics.|
|Soldering or thawing with an open flame||Within 10 feet of—||Materials in a shaft, raise, or winze that could be ignited by hot metal or sparks.|
(5) Cover or bulkhead the opening immediately below and adjacent to the activity with noncombustible material to prevent sparks or hot metal from falling down the shaft, raise, or winze. This alternative applies only to activities involving a shaft, raise, or winze.
Title 30 published on 2014-07-01
no entries appear in the Federal Register after this date.