What is plumb in carpentry?
The term plumb can be used as a verb to describe the activity of a plumber running water supply and drain pipes in a building, but the more important use of the term comes in the context of general construction or carpentry Here, the term plumb refers to a line or feature that is perfectly vertical.
What is plumb in construction?
Plumb is defined as being perfectly vertical, as determined with a level or a plumb bob. In construction , a plumb object maximizes the force of gravity by transferring a load straight down to the ground. Any deviation from plumb weakens that force.
What is a plumb point?
The point at which a vertical line through the perspective center of the camera lens intersects the photo plane. It is the point in the photo plane immediately below the lens at the instant of exposure. Also called camera nadir, photo plumb point , and a nadir point .
How do I check plumb?
To check for accurate plumb vials, rest your level against a wall and note the location of the bubble between the lines. Then rotate the level 180 degrees, edge to edge, keeping the same end facing up. The bubble should be in the same spot. If not, your plumb vial is off.
Why is it called plumb?
major reference. A plumb line is a light line with a weight ( plumb bob) at one end that, when suspended next to a workpiece, defines a vertical line. Plumb comes from the Latin plumbum, or “lead,” the material that replaced stone as…
What is a level in carpentry?
A spirit level , bubble level , or simply a level , is an instrument designed to indicate whether a surface is horizontal ( level ) or vertical (plumb).
What Plumb means?
noun. a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line. Compare plumb line.
What is the purpose of a plumb line?
A plumb line is a weight suspended from a string used as a vertical reference line to ensure a structure is centered. As they always find the vertical axis pointing to the center of gravity, they ensure everything is right, justified and centered.
What does plumb crazy mean?
plumb crazy (comparative more plumb crazy , superlative most plumb crazy ) (informal) Thoroughly crazy ; quite mad.
How plumb Should a wall be?
Walls shall not be out of plumb greater than 1 1/2 inches in 8 feet when measured from the base to the top of the wall . Wood framed walls shall not be more than 3/8 inch out of plumb for every 32 inches in any vertical measurement. All interior and exterior walls have slight variances in their finished surfaces.
What is the difference between plumb and level?
Level is always gauged by a device, such as a carpenter’s level , but level does not always mean parallel to the ground. Plumb is vertical, most accurately gauged by a plumb bob. Levels can show when posts are plumb .
What can I use instead of a plumb bob?
Many chalk lines can be used as plumb – bobs as they are essentially a weight tied to a string. Some even have a pointed bottom to make accurate marking easier.
When would you use a plumb bob?
A plumb bob is a pointed weight attached to the end of the string, and is used to find a vertical reference line called plumb . Plumb is the vertical equivalent to a spirit level.
How do I know if my walls have 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 centre 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 centre.