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The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure, while a mast is held up by stays or guy-wires. [1] A mast is a guyed mast, a thin structure without the shear strength to stand unsupported, that uses attached guy lines for stability ...
Most derricks have at least two components, either a guyed mast or self-supporting tower, and a boom hinged at its base to provide articulation, as in a stiffleg derrick. The most basic type of derrick is controlled by three or four lines connected to the top of the mast, which allow it to both move laterally and cant up and down.
Shanghai Tower skyscraper 5. KRDK-TV mast. The tallest structure in the world is the Burj Khalifa skyscraper at 828 m (2,717 ft). Listed are guyed masts (such as telecommunication masts), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil platforms, electricity transmission towers, and bridge support ...
The Tokyo Skytree in Tokyo, Japan has been the tallest tower since 2012.. This list includes extant structures that fulfill the engineering definition of a tower: "a tall human structure, always taller than it is wide, for public or regular operational access by humans, but not for living in or office work, and which is self-supporting or free-standing, meaning no guy-wires for support."
Joint Venture TV Tower Bithlo Bithlo, Florida: Guyed Mast 489.2 m American Towers Tower Bithlo Bithlo, Florida Guyed Mast 488 m NYT Broadcast Holdings Tower Oklahoma Oklahoma City, Oklahoma Guyed Mast 487.8 m Clear Channel Broadcasting Tower Boykin Boykin, Georgia: Guyed Mast 487.7 m WVFJ Tower Saint Marks Saint Marks, Georgia: Guyed Mast 486.4 m
The tallest guyed tower is currently the 2,060 feet (630 m) KRDK-TV mast in Traill County, North Dakota, USA. The mast on heavy equipment such as a crane is its main supporting tower, typically of trussed steel construction. Wire rope guys typically led back to the crane's base stabilize it and support its ability to bear significant shear ...
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The diamond-shaped tower was patented by Nicholas Gerten and Ralph Jenner for Blaw-Knox July 29, 1930. [5] and was one of the first mast radiators.[1] [6] Previous antennas for medium and longwave broadcasting usually consisted of wires strung between masts, but in the Blaw-Knox antenna, as in modern AM broadcasting mast radiators, the metal mast structure functioned as the antenna. [1]