What Is Plumb?
In construction or carpentry, the termplumbrefers to a line or feature that is perfectly vertical.
In technical design, it represents an imaginary line that runs straight to the center of the earth.
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Plumb is the counterpart tolevel,which means to be perfectly horizontal.
It’s an adjective when it describes something that is perfectly vertical: “The wall is plumb.”
“It’s an adverb that is used, such as “Check the fence for plumb.”
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A few degrees out of plumb and entire buildings can come toppling down.
Builders today often uselaser levelsto project plumb lines of light onto surfaces or building elements.
The plumb bob is the oldest, simplest, and still one of the best tools for establishing plumb.
It consists of a weight (the plumb) hanging at the end of a strong string.
The user suspends the weight from the string at a fixed point.
Often, it takes two people to use a plumb bob.
Levels come in many lengths, from short nine-inch torpedo levels to four-foot-long mason’s levels.
Digital levels are even available for easier reading.
This is because a post can be plumb from left to right without being plumb from front to back.
For this reason, there’s a handy tool for checking square fence posts or deck posts.
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