ranging pole

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range rod, range pole

A wood, fiberglass, aluminum, or steel lining pole used by surveyors as a sighting rod for locating points or directions of lines in marking alignment; approx. 1 in. (2.5 cm) thick and 6 to 10 ft (approx. 2 to 3 m) long; usually painted with alternate red and white bands.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.