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Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
Washington Monument
Tower
Completed
1884
observation
masonry
169.1 m / 555 ft
Construction Start
Completed
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CTBUH Involved in Re-Measurement of Washington Monument Height
17 February 2015 - Media
24 August 2015
Myth-busting: The Incredible “Shrinking” Washington Monument
Dru Smith, National Oceanic & Atmospheric Administration
In February 2015, the Washington Monument “shrunk” almost 10 inches (248 millimeters), when the United States National Oceanographic and Atmospheric Administration (NOAA)’s National Geodetic Survey...
24 August 2015
Myth-busting: The Incredible “Shrinking” Washington Monument
In February 2015, the Washington Monument “shrunk” almost 10 inches (248 millimeters), when the United States National Oceanographic and Atmospheric Administration (NOAA)’s National Geodetic Survey...
24 August 2015
World’s Highest Observation Decks
Perhaps no element of a tall building is more closely related to the pure pleasure of standing high in the sky and taking in the...
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