Barring

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The end and side timber bars used for supporting a rectangular shaft. The bars are notched into one another to form a rectangular set of timber. Common sizes are from 9 to 12 in (23 to 30.5 cm) deep and from 3 to 6 in (7.6 to 15.2 cm) thick and may be made from larch, white pine, or red pine. See also: cribbing; steel rectangular shaft supports. Nelson

Source: Dictionary of Mining, Mineral, and Related Terms


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