Use of a plumb bob a level used on plumb rather then horizontal
Use a plumb line.
To show a vertical line
The plumb line is a vertical straight line.
A plumb bob is a weighted instrument used in construction and carpentry to create a vertical reference line. It helps ensure that structures are built accurately and in alignment with a true vertical.
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.
A line 90 degrees from horizontal is a plumb line.
In a vertical or perpendicular line. e.g. "The wall is plumb."This is the most common meaning and alludes to the method of establishing vertical by using a plumb bob - a weight suspended from a long line which hangs straight down - with the resulting line between the top of the line and the plumb bob being a reference for the edge of something that is supposed to be perfectly vertical. If it is further away from the line at the top or bottom of the line than it is at the other end, it is not quite "plumb".There are, of course, several more informal uses for the term:(Informal definition) Directly; squarely: e.g. "It fell plumb in the middle."(sometimes also spelled as "plum" with the informal definition...) Utterly; completely: e.g "I'm plumb worn out."informal chiefly US (intensifier): e.g. "That's just plumb stupid."
A plumb line hangs vertically due to the force of gravity acting on the weight at its lower end. This force pulls the weight straight down towards the center of the Earth, establishing a vertical orientation. As a result, the string of the plumb line aligns itself with the gravitational pull, ensuring it remains perfectly vertical. This property is used in construction and surveying to establish true vertical lines.
In a vertical or perpendicular line. e.g. "The wall is plumb."This is the most common meaning and alludes to the method of establishing vertical by using a plumb bob - a weight suspended from a long line which hangs straight down - with the resulting line between the top of the line and the plumb bob being a reference for the edge of something that is supposed to be perfectly vertical. If it is further away from the line at the top or bottom of the line than it is at the other end, it is not quite "plumb".There are, of course, several more informal uses for the term:(Informal definition) Directly; squarely: e.g. "It fell plumb in the middle."(sometimes also spelled as "plum" with the informal definition...) Utterly; completely: e.g "I'm plumb worn out."informal chiefly US (intensifier): e.g. "That's just plumb stupid."
Mainly bricklayers, but also anyone else that need to know if something is perfectly vertical in all planes (from all directions).
When something is plumb, it is perfectly vertical or upright, aligning directly with the force of gravity. This term is often used in construction and carpentry to ensure that structures are straight and stable. A plumb line, for example, is a tool that helps achieve this vertical alignment. In essence, being plumb indicates that an object is not leaning or tilted.
A plumb line is a tool used in construction and surveying to establish a vertical reference line. It consists of a weight, often a pointed metal tip, suspended from a string or line. When the weight is allowed to hang freely, it indicates the true vertical direction, helping ensure walls and structures are straight and level. Plumb lines are essential for accurate alignment and stability in building projects.