This plumb line is important for lining up anatomical geometries and visualizing the subject's center of balance. The device used may be purpose-made plumb lines, or simply makeshift devices made from a piece of string and a weighted object, such as a metal washer.
Students of figure drawing will also make use of a plumb line to find the vertical axis through the center of gravity of their subject and lay it down on paper as a point of reference. Determining center of gravity of an irregular shape The weight would hang in a container of oil to dampen any swinging movement, functioning as a shock absorber. The early skyscrapers used heavy plumb-bobs hung on wire in their elevator shafts. Thus, the builder can ensure that the structure he is constructing is erected perfectly true and the painter can use it as a reference. A plumb bob, typically a pointed lead weight, is suspended from a string and gravity then makes the string hang perfectly straight.
Plumb bob definition free#
A plumb bob is basically a free hanging weight, which is shaped to allow the center of gravity to align with the center of the weight. A plumb line is a tool used by builders and painters to find the true vertical.
To be plumb is to form a right angle to the horizontal surface of a floor, ceiling, or other element. PLUMB BOB meaning: 1 : a usually small, heavy object that is used to make a string or rope hang straight the heavy object that is part of a plumb line. Although a plumb-bob and line alone can only determine a vertical, if mounted on a suitable scale the instrument may also be used as an inclinometer to measure angles to the vertical. A plumb bob is a tool that will allow an accurate representation of the plumb orientation of a structural or other construction element.
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