plumb rule

Isaac Kremer/ June 21, 2019/ / 0 comments

An instrument for determining verticality, consisting of a narrow board with straight parallel edges, having a plumb line attached to one end and a hole at the other end large enough to allow the plumb to swing freely. The verticality of its edges is known when the plumb line coincides with the center line of the board, as marked on its face. (Sturgis, 1900)

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About Isaac Kremer

Isaac is a nationally acclaimed downtown revitalization leader, speaker, and author. Districts Isaac managed have achieved over $1 billion of investment, more than 1,899 jobs created, and were 2X Great American Main Street Award Semifinalists and a 1X GAMSA winner in 2023. His work has been featured in Newsday, NJBIZ, ROI-NJ, Patch, TapInto, and USA Today. Isaac is a Main Street America Revitalization Professional (MSARP), with additional certifications from the International Economic Development Council, National Park Service, Project for Public Spaces, Grow America (formerly the National Development Council), and the Strategic Doing Institute.

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