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  2. El Castillo, Chichen Itza - Wikipedia

    en.wikipedia.org/wiki/El_Castillo,_Chichen_Itza

    In agreement with this pattern, detected both in the Maya Lowlands [9] and elsewhere in Mesoamerica, [10] the north (and main) face of the temple of Kukulcán at Chichén Itzá has an azimuth of 111.72°, corresponding to sunsets on May 20 and July 24, separated by 65 and 300 days (multiples of 13 and 20). Significantly, the same dates are ...

  3. Chacmool - Wikipedia

    en.wikipedia.org/wiki/Chacmool

    Maya chacmool from Chichen Itza, excavated by Le Plongeon in 1875, now displayed at the National Museum of Anthropology in Mexico City. A chacmool (also spelled chac-mool or Chac Mool) is a form of pre-Columbian Mesoamerican sculpture depicting a reclining figure with its head facing 90 degrees from the front, supporting itself on its elbows and supporting a bowl or a disk upon its stomach.

  4. Corbel arch - Wikipedia

    en.wikipedia.org/wiki/Corbel_arch

    Corbeled arches are a distinctive feature of certain pre-Columbian Mesoamerican constructions and historical/regional architectural styles, particularly in that of the Maya civilization. The prevalence of this spanning technique for entrances and vaults in Maya architecture is attested at a great many Maya archaeological sites , and is known ...

  5. Maya architecture - Wikipedia

    en.wikipedia.org/wiki/Maya_architecture

    Maya architecture tends to integrate a great degree of natural features. For instance, some cities existing on the flat limestone plains of the northern Yucatán grew into great sprawling municipalities , while others built in the hills of Usumacinta utilized the natural loft of the topography to raise their towers and temples to impressive ...

  6. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    The key point is that the plumbing term focuses on the degree of bend from the original straight pipe, not the resulting angle. Elbows are also categorized by length. The radius of curvature of a long-radius (LR) elbow is 1.5 times the pipe diameter, but a short-radius (SR) elbow has a radius equal to the pipe diameter. Wide available short ...

  7. Street elbow - Wikipedia

    en.wikipedia.org/wiki/Street_elbow

    Street elbows are available with bend angles of 90°, 45°, and 22.5°. They can be used in many plumbing applications, including water supply, drainage, sewers, vents, central vacuum systems, compressed air and gas lines, heating and air conditioning, sump pump drains, and other locations where plumbing fittings would be used to join sections of pipe.

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