What is a plumb bob tool used for?
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What is a plumb bob tool used for?
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. Plumb bob has been around for thousands of years, dating back to Ancient Egypt.
What are the parts of a plumb bob?
A plumb-bob (sometimes called a “plumb-line” or “plummet”) consists of a specially-balanced symmetrical weight, typically with a narrow or pointed tip, which is attached to and suspended from a string to create a vertical reference line.
Is plumb bob a testing tool?
Checking for plumb A plumb-bob is a simple tool that is used to establish whether something is “plumb” (exactly vertical).
Is plumb bob a tool or material?
Being one of the oldest tools known to humankind, the plumb-bob has been made out of variety of materials over the millennia, from simple stone to hardened steel.
What is plumb bob and line?
A plumb bob, plumb bob level, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum.
What is a plumb object?
In construction or carpentry, the term plumb refers 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. Plumb is the counterpart to level, which means to be perfectly horizontal.
What is the classification of plumb bob?
When was a plumb bob first used?
There is evidence that tells us plumb-bobs have been in use since the dawn of civilisation. It seems they were used by the Babylonians, the ancient Egyptians, the ancient Greeks and the Romans to make accurate vertical lines when building or marking the points of stars and planets.
What are the steps in using the plumb bob?
How to check for plumb using a plumb-bob
- Step 1 – Mark point.
- Step 2 – Fix nail and attach string.
- Step 3 – Suspend plumb-bob.
- Step 4 – Allow plumb-bob to stop swinging.
- Step 5 – Mark point below plumb-bob.
- Step 6 – Measure distance.
How do you measure plumb?
Measure the distance from the vertical surface to the top of the string. Measure the distance from the vertical surface to the tip at the bottom of the weight. When the two measurements match, the surface is plumb. If not, adjust the surface until the measurements match.
