11/28/2023 0 Comments Ancient plumb bob![]() Some bobs have pointed tips that can be bent by repeated use or abuse if the point on yours is bent or out of alignment, replace it. Excavation and foundation contractors rely upon the plumb line, and constructing a chimney the tool can indicate whether a flue is running true vertical or veering off plumb. Surveyors sometimes use plumb bobs for lining up points or transferring them. Some are bullet- or cone-shaped, but in the DIY world they’re often in the guise of a chalk box or chalk line. That weighted object can be as simple as a rock or as elaborate as the brass plumb bob shown. The plumb line in one place can be used to sight an object in another - a pipe, for example - for plumb. A plumb bob is a weighted object connected to a string that can be used to establish a vertical line. Once it is hung and still, the top and bottom points can be marked and used as guides. They are often made of brass, steel, or lead and come in. ![]() For example, you can locate fixtures or decorations in relation to an object or surface below (or above) using the plumb line. Some other names for plumb bobs in ancient times are Indians plummet, Chinese plumb, and Roman plumb. A spirit level will also accomplish those tasks, but some jobs are much more easily done using the tool. ![]() The plumb bob is useful in establishing vertical for a wall in construction or a doorjamb when hanging a door. (Note that the line must be hanging free to get an accurate reading.) The weight, or bob, is then allowed to swing freely when it stops, the point of the bob is precisely below the point at which the string is fixed above. To use the tool, the string is fixed at the point to be plumbed. 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.
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