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사용자:구순돌/연습장/KVLY-TV 마스트

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KVLY-TV mast
KVLY-TV mast in 2018
기본 정보
위치Blanchard, Traill County, North Dakota, U.S.
상태계획중

The KVLY-TV mast (formerly the KTHI-TV mast) is a television-transmitting mast in Blanchard, North Dakota. It is used by Fargo station KVLY-TV channel 11 and KXJB-LD's Argusville/Valley City/Mayville translator K28MA-D channel 28. Completed in 1963, it was once the tallest structure in the world, and stood at 2,063 feet (629 meters) until 2019, when the top mount VHF antenna was removed for the FCC spectrum repack, dropping the height to 1,987 ft (605.6 m).[1]

In 1974, it was succeeded by the Warsaw radio mast as the world's tallest structure. The Warsaw mast collapsed in 1991, again making the KVLY-TV mast the tallest structure in the world until the Burj Khalifa surpassed it in 2008. It became the third tallest when the Tokyo Skytree was completed in 2012, then the fourth tallest when the Shanghai Tower took third place in 2013. It remained the tallest structure in the Western Hemisphere, and the tallest broadcasting mast in the world until the antenna removal in 2019.

Location[편집]

KVLY-TV mast compared to the tallest buildings in the world. KXJB-TV has since been renamed KRDK-TV.

The mast is located 3 마일 (4.8 km) west of Blanchard, North Dakota, halfway between Fargo and Grand Forks. It became the tallest artificial structure, and the first man-made structure to exceed 2,000 피트 (610 m) in height, upon the completion of its construction on August 13, 1963.

Construction[편집]

The tower was built by Hamilton Erection Company of York, South Carolina, and Kline Iron and Steel, and required thirty days to complete, at a cost of approximately $500,000[2] (roughly $423만 today[3]). Construction was completed August 13, 1963.[4]

Owners[편집]

틀:Unsourced Owned by Gray Television of Atlanta, Georgia, the tower broadcasts at 356 kW on channel 36 for television station KVLY-TV (channel 11 PSIP, an NBC/CBS affiliate) which is based in Fargo, North Dakota. The tower provides a broadcast area of roughly 9,700 제곱마일 (25,000 km2), which is a radius of about 55.6 마일 (89.5 km). CBS/CW+ affiliate KXJB-LD's translator K28MA-D also broadcasts on this tower at 15 kW on UHF channel 28 (also its virtual channel).

When the mast was built, the call letters of the television station for which it was built were changed to KTHI, the "HI" referring to the height of the mast. The top is reachable by a two-person service elevator (built by Park Manufacturing of Charlotte, North Carolina) or ladder.

Specifications[편집]

The tower consists of two parts: a lattice tower of 1,950 피트 (590 m);[5] topped by the transmitting antenna array of 53 피트 (16 m). The total height of both is 1,987 피트 (606 m). The antenna weighs 9,000 파운드 (4.1 t), the lattice tower weighs 855,500 파운드 (388.0 t), giving a total weight of 864,500 파운드 (392.1 t). It takes up 160 에이커 (65 ha) of land with its guy anchors.[6][7] Its height above mean sea level is 2,962 피트 (903 m).

Federal rule change[편집]

Some time after its completion, the Federal Communications Commission (FCC) and Federal Aviation Administration (FAA) imposed a policy that states, "Although there is no absolute height limit for antenna towers, both agencies have established a rebuttable presumption against structures over 2,000 feet above ground level." The FCC and FAA may approve a taller structure in "exceptional cases."[8]

Gallery[편집]

  • KVLY tower from a distance of about one mile (1.6 km)
    KVLY tower from a distance of about one mile (1.6 km)
  • A guy-wire anchor
    A guy-wire anchor
  • Detail of the tower, showing its network of guy-wires
    Detail of the tower, showing its network of guy-wires
  • Some of the guy-wires that support the tower (with Stockbridge dampers)
    Some of the guy-wires that support the tower (with Stockbridge dampers)
  • Looking up at the KVLY-TV mast from its base
    Looking up at the KVLY-TV mast from its base
  • Building at the base of the KVLY-TV tower
    Building at the base of the KVLY-TV tower

Structures of similar height[편집]

See also[편집]

References[편집]

  1. ↑ “FCCInfo Structure Registration Results”. 
  2. ↑ Blanchard. “KVLY Tower”. Structurae. 2019년 7월 17일에 확인함. 
  3. ↑ Federal Reserve Bank of Minneapolis Community Development Project. “Consumer Price Index (estimate) 1800–”. Federal Reserve Bank of Minneapolis. 2018년 4월 3일에 확인함. 
  4. ↑ “ASR Registration 1046244”. U.S. Federal Communications Commission. 
  5. ↑ “N.D. TV Tower No Longer World's Tallest”. 《All Things Considered》 (NPR.org). 2010년 1월 5일. 2011년 12월 6일에 확인함. 
  6. ↑ “KVLY-TV Tower”. Emporis. 2011년 12월 6일에 확인함. 
  7. ↑ “Info”. Valleynewslive.com. 2010년 8월 6일에 원본 문서에서 보존된 문서. 
  8. ↑ “Antenna Tower Lighting and Marking Requirements”. Federal Communications Commission. 2016년 6월 28일. 2018년 9월 29일에 확인함. 

External links[편집]

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기록
이전
WIMZ-FM-Tower 		World's tallest structure
2,063 ft (628.8 m)
1963–1974 		이후
Warsaw radio mast
이전
Warsaw radio mast
1991–2008 		이후
Burj Khalifa


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