![]() The plumb-bob level consists of a roughly F-shaped frame with a plumb-bob attached to the top. The plumb-bob’s line is fed through a hole in the uppermost horizontal beam of the “F” frame and the plumb-bob is suspended and allowed to dangle freely below. Plumb-bob levels, or “plumb rods” have been used for centuries as a simple and accurate way to determine whether a surface is vertical and plumb. ![]() If, however, you are only a one-off or infrequent user, then the simplicity and inexpensiveness of a plumb-bob may be the right choice for you. If you are going to be using a laser level on a regular basis, then it may be worth the extra expense. Laser levels are impressive tools, but they can be expensive. They can be set for vertical and horizontal planes for quick and easy reference lines. ![]() Laser levels are the high-tech tool of the marking-out world. For checking over long distances, a plumb-bob would be more suitable. The disadvantage of using a spirit level over a plumb-bob is that a spirit level is only accurate over the distance of its length. If it is more to one side or the other, then your surface is not plumb. If your surface is plumb, the little bubble should line-up directly in the middle of the two lines on the vial. Using a spirit level is an excellent way to determine whether or not a horizontal surface is level, but it can also be used to tell whether a vertical surface is plumb.īy holding the spirit level against a vertical surface and looking at its bubble, you will be able to determine whether the surface is plumb or not. Send us feedback about these examples.If you don’t have a plumb-bob handy, then there are a few alternatives you can use: These examples are programmatically compiled from various online sources to illustrate current usage of the word 'plumb bob.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2018 Cake pans, coffee pots, cash registers, and a white ElectroChef stove appeared amid scientific instruments such as steel calipers and a brass plumb bob. David Grossman, Popular Mechanics, 17 Jan. Rhett Allain, WIRED, Accurate to within 1/4 of an inch per 100 feet of range, the kit comes with a tripod with quick-adjust legs, a heavy-duty 8-foot aluminum grade rod (feet-inches-eighths), a plumb bob, and a kit box to safeguard the laser during transport. 2019 The plumb bob will hang at the angle reading for your latitude. Andrew Tallon, National Geographic, 16 Apr. 2020 For a long time, the tools used to measure medieval buildings were nearly as old as the buildings themselves: plumb bobs, string, rulers, and pencils. Ryan D'agostino, Popular Mechanics, 24 Oct. 2022 For holes deeper than three feet, drop a plumb bob (a conical weight attached to a string) into it to give you some sense whether the hole itself is plumb and uniformly shaped. Jennifer Ouellette, Ars Technica, Where many competitors use surveying equipment that’s accurate to within a thousandth of a degree to orient their robots on startup, Coordinated often relies on a plumb bob (cost: a few bucks). Recent Examples on the Web Possible uses included: a plumb bob or a loom weight, a liquid sprinkler, a fire starter, a lamp, a smoking pipe, or parts of an apparatus for distillation.
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