Battles of Cabin Creek

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Summary

DescriptionGin pole derrick.gif	English: A "gin pole derrick" is a derrick without a boom. Its guys are so arranged from its top as to permit leaning the mast in any direction. The load is raised and lowered by ropes reeved through sheaves or blocks at the top of the mast.
Date	Unknown date Unknown date
Source	https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9832&p_table=STANDARDS
Author	Occupational Safety & Health Administration, U.S. Department of Labor

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