plum

Isaac Kremer/ November 23, 2025/ / 0 comments

Vertically straight, exactly in line. To achieve a vertically straight line in a wall, the mason makes use of a plumb-line, a cord which has a metal weight at one end for determining the vertical direction. (Coles, 1961)

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About Isaac Kremer

IsaacKremer.com is the personal website of Isaac Kremer, MSARP, a nationally recognized leader in the Main Street Approach to commercial district revitalization with over 25 years of experience. Kremer, New Jersey's first certified Main Street America Revitalization Professional (MSARP), has served as founding executive director for organizations like Experience Princeton and the Metuchen Downtown Alliance, which won a Great American Main Street Award under his leadership. He recently became director of the Royal Oak Downtown Development Authority in Michigan.

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