Engineering:Rope stretcher
In ancient Egypt, a rope stretcher (or harpedonaptai) was a surveyor who measured real property demarcations and foundations using knotted cords, stretched so the rope did not sag. The practice is depicted in tomb paintings of the Theban Necropolis.[1] Rope stretchers used 3-4-5 triangles and the plummet,[2] which are still in use by modern surveyors.
The commissioning of a new sacred building was a solemn occasion in which pharaohs and other high-ranking officials personally stretched ropes to define the foundation. This important ceremony, and therefore rope-stretching itself, are attested over 3000 years from the early dynastic period to the Ptolemaic kingdom.[3]
Rope stretching technology spread to Ancient Greece and India , where it stimulated the development of geometry and mathematics.
See also
References
- ↑ Robillard, Walter G.; Wilson, Donald A.; Brown, Curtis M.; Eldridge, Winfield (31 January 2011). Evidence and Procedures for Boundary Location. John Wiley & Sons. p. 282. ISBN 9780470901601. https://books.google.com/books?id=n-4eWtgEXjoC&pg=PT282.
- ↑ Petrie Museum website: plumbs
- ↑ Williams, Kim; Ostwald, Michael J. (9 February 2015). Architecture and Mathematics from Antiquity to the Future: Volume I: Antiquity to the 1500s. Birkhäuser. p. 98. ISBN 9783319001371. https://books.google.com/books?id=fWKYBgAAQBAJ&pg=PA98.
- Macintosh Wilson, Alistair (1995). The Infinite in the Finite. Oxford University Press. ISBN 9780198539506. https://books.google.com/books?id=nh7rwAEACAAJ.
- The New Encyclopædia Britannica, Encyclopædia Britannica 1974
- James Henry Breasted Ancient Records of Egypt, Part Two, Chicago 1906
- Joel F. PAULSON, "Surveying in Ancient Egypt,", FIG Working Week 2005 and GSDI-8, Cairo, Egypt April 16-21, 2005. [1]
External links
- surveying instruments
- proportions "The knowledge of pleasing proportions of the rope stretchers was incorporated by the Greeks"
- Sangaku and The Egyptian Triangle
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