A headframe (also known as a gallows frame, winding tower, hoist frame, pit frame, shafthead frame, headgear, headstock or poppethead) is the structural frame above an underground mine shaft. ==Design== Modern headframes are built out of steel, concrete or a combination of both. Timber headframes are no longer used in industrialized countries, but...
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http://en.wikipedia.org/wiki/Headframe
The structure surmounting the shaft which supports the hoist rope pulley, and often the hoist itself.
Found on
http://www.coaleducation.org/glossary.htm
The structure surmounting the shaft which supports the hoist rope pulley, and often the hoist itself.
Found on
http://www.rocksandminerals.com/glossary.htm
a structure supporting the hoisting sheaves at the top of a mineshaft. Also called gallows frame.
Found on
https://www.encyclo.co.uk/local/22701
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