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lines for the building measurements. A section of the scaffolding would hold a plumb line, which was centered over a datum mark on the floor. As the building proceeded upward, the plumb line would also be taken higher, still centered on the datum. Many cathedral
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with a plumb line hung from the vertex was also used to find horizontal; these were used in Europe until the mid–19th century. A variation of this tool has the plumb line hung from the top of an inverted
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A plumb bob may be in a container of water (when conditions are above freezing temperatures), molasses, very viscous oils or other liquids to dampen any swinging movement, functioning as a
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A plumb bob and line alone can determine only a vertical reference. However, if they are mounted on a suitable scale the instrument may also be used as an
182:. It is typically made of stone, wood, or lead, but can also be made of other metals. If it is used for decoration, it may be made of bone or ivory.
402:. The device used may be purpose-made plumb lines, or simply makeshift devices made from a piece of string and a weighted object, such as a
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still have brass datum marks inlaid into their floors, which signify the center of the structure above.
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Until the modern age, plumb bobs were used on most tall structures to provide vertical
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520:,. 2nd ed. Stanford University, Calif.: Stanford University Press, 1964. Print. 138.
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used a plumb line attached to the top outer part of a tool resembling a letter
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Experiments in
Egyptian archaeology: stoneworking technology in Ancient Egypt
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500:"Hand tool | Measuring and defining tools | Plumb line, level, and square"
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will also make use of a plumb line to find the vertical axis through the
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of a point in space. It is used with a variety of instruments (including
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This article is about the tool. For the nuclear testing program, see
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or to transcribe positions onto the ground for placing a marker.
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used heavy plumb bobs, hung on wire in their elevator shafts.
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Brinker, Russell
Charles; Minnick, Roy, eds. (1995).
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McGeough, Joseph A.; Hartenberg, Richard S. (2019).
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Determining center of gravity of an irregular shape
74:. Unsourced material may be challenged and removed.
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37:"Plumbline" redirects here. For other uses, see
398:of their subject and lay it down on paper as a
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225:) to set the instrument exactly over a fixed
279:'), the material once used for the weighted
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27:Weighted line used as a vertical reference
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297:, from the notion of "standing upright".
189:has been used since at least the time of
134:Learn how and when to remove this message
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291:developed by extension, as did the noun
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329:Plumb bob with scale as an inclinometer
14:
902:
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337:Plumb bob with string in masonry work
72:adding citations to reliable sources
43:
345:to measure angles to the vertical.
197:", or vertical. It is also used in
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193:to ensure that constructions are "
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925:Woodworking measuring instruments
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178:and used to establish a vertical
48:
256:Cassells' Carpentry and Joinery
244:Cassells' Carpentry and Joinery
59:needs additional citations for
518:Introduction to mine surveying
510:
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1:
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619:Coordinate-measuring machine
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285:at the end. The adjective
174:. It is a precursor to the
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39:Plumbline (disambiguation)
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540:String Line and Plumb Bob
863:Machine and metalworking
504:Encyclopaedia Britannica
170:as a reference line, or
873:Measuring and alignment
930:Orientation (geometry)
466:The surveying handbook
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920:Surveying instruments
915:Measuring instruments
470:. Springer. pp.
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838:Cutting and abrasive
674:Laser measuring tool
254:A plumb square from
68:improve this article
579:and alignment tools
444:. Routledge; 2003.
269:derives from Latin
201:, to establish the
940:Stonemasonry tools
784:Thread pitch gauge
609:Combination square
400:point of reference
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241:A plumb rule from
209:) with respect to
168:vertical direction
152:
32:Operation Plumbbob
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589:Architect's scale
481:978-0-412-98511-9
450:978-0-415-30664-5
438:Denys A. Stocks.
420:Vertical position
408:center of balance
396:center of gravity
349:Ancient Egyptians
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16:(Redirected from
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669:Laser line level
634:Engineer's scale
629:Drafting machine
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124:November 2023
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85: –
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79:Find sources:
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57:This article
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19:
774:Tape measure
759:Straightedge
749:Steel square
744:Spirit level
739:Speed square
714:Radius gauge
703:
679:Lesbian rule
649:French curve
639:Feeler gauge
594:Beam compass
517:
512:
503:
465:
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439:
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404:metal washer
390:Students of
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343:inclinometer
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176:spirit level
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66:Please help
61:verification
58:
888:Woodworking
664:Laser level
644:Flat spline
373:skyscrapers
223:steel tapes
219:theodolites
150:A plumb bob
83:"Plumb bob"
904:Categories
789:Try square
779:Theodolite
724:Set square
709:Protractor
699:Micrometer
694:Meterstick
604:Chalk line
426:References
371:The early
187:instrument
172:plumb-line
94:newspapers
18:Plumb line
704:Plumb-bob
577:Measuring
267:plumb bob
233:Etymology
199:surveying
156:plumb bob
843:Forestry
833:Cleaning
769:T-square
599:Calipers
414:See also
945:Weights
868:Masonry
858:Kitchen
809:Wiggler
754:Stencil
729:Skirret
614:Compass
368:shape.
272:plumbum
211:gravity
164:plummet
108:scholar
878:Mining
848:Garden
764:Square
478:
448:
320:towers
312:spires
294:aplomb
221:, and
215:levels
207:zenith
110:
103:
96:
89:
81:
883:Power
719:Ruler
474:–94.
316:domes
307:datum
288:plumb
263:plumb
203:nadir
195:plumb
180:datum
162:, or
115:JSTOR
101:books
853:Hand
799:Vise
476:ISBN
446:ISBN
318:and
277:lead
261:The
185:The
87:news
659:Jig
301:Use
282:bob
265:in
70:by
906::
502:.
490:^
472:93
410:.
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314:,
275:('
217:,
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154:A
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365:T
354:E
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112:·
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