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. The plumb line in one place can be used to sight an object in another - a pipe, for example - for plumb. Once it is hung and still, the top and bottom points can be marked and used as guides. For example, you can locate fixtures or decorations in relation to an object or surface below (or above) using the plumb line. 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. The plumb bob point is a replacement part that fits any of the SECO plumb bobs, Fits plumb bob item s 6000-012 through 6000-032. (Note that the line must be hanging free to get an accurate reading.) Whenever surveying instruments need to be placed over precise survey markers, the task often calls for the use of a plumb bob. A plumb bob is a weight with a pointed tip on the bottom thats hung from a string, and its used to establish a vertical reference (called a plumb line). 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. We supply a range of quality brass and steel plumb bobs, supplied in a variety of weights to provide perfect vertical datum lines, transcribe positions onto. To use the tool, the string is fixed at the point to be plumbed. Vertical planes Plumb-bobs Out-of-plumb measurements can readily be made by suspending a weighted line from the top of a wall and measuring the gap between.
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