safety platform

safety platform

a. A platform built in a derrick as a safe working place for workers who must be up the derrick to handle elevators, casing, drill rods, etc. Long
b. A platform with a hinged-door opening, over a shaft while being sunk, esp. where blasted materials are hoisted with a muck bucket. After the bucket is hoisted, the hinged door is closed to prevent any material from falling back onto workers in the shaft.
Source: Dictionary of Mining, Mineral, and Related Terms

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