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A plumb bob is a weight on the end of a string. It usually has a pointed lower end.

It is hung adjacent to or in line with building elements to check whether they are "plumb" or "true to the vertical".

A weight on a string holds the string under tension in a straight line down to the ground because of gravity. A person can move so they can see whether the straight line of the string lines up against the built element, to tell whether it is vertical.

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Q: How is a plumb bob used to check the vertical of a building under construction?
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how do you check a vertical frame for plumb?

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What is the use of a plumb bob in plumbing?

The plumb bob is useful in establishing vertical for a wall in construction or a doorjamb when hanging a door. It can indicate whether a flue is running true vertical or veering off plumb. A plumb-bob or a plummet is a weight, usually with a pointed tip on the bottom, that is suspended from a string and used as a vertical reference line, or plumb-line. It is essentially the vertical equivalent of a water level.


How do they know the plumb line is vertical?

Use of a plumb bob a level used on plumb rather then horizontal


What is a vertical plumb rod used for?

For measuring 'plumb' in conjunction with a spirit level.


Can something be level and out of plumb?

YES. Level is interpruted to be horizontal and plumb vertical. Now, most levels have a plumb level and can be used in the vertical position. this is stil however checking for plumb and not level. Hope this helps Terry


The term plumb refers to which position?

Vertical


Check a vertical wall frame for plumb?

The easiest way to check walls for plumb is to put a spirit level on the wall. If the bubble is not in the center of the vial, you'll need to find out how far out of plumb the wall is by moving either the top or bottom of the level away from the wall until the bubble finds the center.


How do you draw a vertical line?

Use a plumb line.


What is the purpose of the plumb bob?

To show a vertical line


When an object is plumb it is?

perfectly vertical


Does a Plumb-bob tell you if a surface is vertical?

Yes it does! :)


What is plumb bob use for?

To establish a plumb line. Vertical line. Basic tool that lets you do everything else. With a plumb bob and something to measure with you can build anything.