Several other locations were considered, but due to the continuing resistance of nearby inhabitants (backed by the Solidarity trade union), planned mast height and transmitter range were both greatly reduced, and an old military site just southeast of Solec Kujawski was chosen. Despite being a work of technological and engineering mastery, the building was badly maintained, and this neglect led to tragic results. Plans were originally drawn up to rebuild the structure in the same location. That record stood until 1974 when the largest guyed structure ever built was constructed: the Warsaw Radio Mast. Recommended option. August 8, 1991: The Warsaw Radio Mast collapses. Because a large portion of the staff was recruited from around Poland, a new block of flats was built 30 km away in Sochaczew to accommodate the staff. When it became evident that Raszyn could not provide coverage to the entire country, the station received an increase of power to 500kW, but this too failed. Warsaw Radio Mast, which was designed by Jan Polak, was 646.38 metres (2,120.67 ft) … [14] During storms, when the mast could not operate, the signal would be temporarily switched to Raszyn, a process that was eased thanks to direct phone lines from RCN Konstantynów to both Raszyn and the energy sector. The Warsaw Radio Mast's weight was debated; Polish sources claimed 420 tonnes (930,000 lb). It remains the second tallest structure ever constructed after the Burj Khalifa. The Raszyn mast had been prioritized to cover the Eastern Borderlands, and so Polish authorities did not consider reception in the Recovered Territories. The transmission building used a NEC radio set and the TN60 multiple telephony system. [36][37], The Polish Film Chronicle, a Polish newsreel, featured the Warsaw Radio Mast. In the late 1960s it was decided to construct a new central transmitter at the geographical centre of Poland. You are probably wracking your brains: surely you would remember this in the news and history books? The outer ring served as the support of another set of 24 wires, known as the "outer braid." KVLY-TV Mast height is 629 m (2063.648 ft). The mast was designed by Jan Polak and was 2,120.7 feet tall. The vertical steel tubes forming the vertices of the mast had a diametre of 245 millimetres (10 in); the thickness of the walls of these tubes varied between 8–34 mm (0.31–1.33 in) depending on height. [2] The opening of the mast was met with extensive celebration and news coverage by the Polish Film Chronicle. This tube was grounded at the bottom, and connected electrically to the mast structure by an adjustable metal bar at a height of 328.68 metres (1,078.3 ft) when the tower transmitted on 227 kHz longwave and at a height of 334.18 metres (1,096.4 ft) when it switched to 225 kHz on 1 February 1988. Unfortunately, it collapsed in a spectacular fashion in 1991. [18], The manager of the radio station from 1974 to 1980 was Zygmunt Duczmalewski . The substation was over-engineered due to the strategic importance of the station as Poland's central transmitter, featuring an asymmetrical coaxial power supply. $1 million USD). An area for maintenance supplies was present, in order to transport materials such as lightbulbs for the aircraft warning lights. For frequencies lower than the longwave range, masts have to be electrically enlarged by base loading coils or structures on the top, because the heights required for masts of even a quarter wavelength are too large to realize physically. Select an option below to see step-by-step directions and to compare ticket prices and travel times in Rome2rio's travel planner. Basement Konstantynow Radio Mast17092015.JPG 5,058 × 3,372; 14.52 MB [30] There were once again protests in this location, but tensions were eased when Polish Radio donated PLN 3.5 million towards the development of the local community. The report showed extensive structural damage caused by strong winds. Salvaging And Restoration Conception Of The SL 61 B3 Long-Wave Transmitter", "Marian Siedlarek o Konstantynowie podczas burz / Maszt w Konstantynowie", "RadioPolska • Obiekt nadawczy | RTCN Warszawa *Raszyn*", "25 years ago today, the tallest structure on earth you've never heard of collapsed", "Maszt radiowy w Konstantynowie. The elevator was designed by Alimak, a Swedish company, and took 45 minutes to reach the top. [3], The Warsaw radio mast (centre) viewed from a distance in 1989, Warsaw Radio Mast ( Konstantynow Radio Mast), PAP News Wire, April 7, 1992, NEWS, 106 words, RADIO MAST IN GABIN TO OPERATE AGAIN, overhead radio frequency transmission line, FM radio and TV transmission mast at Olsztyn-Pieczewo, List of catastrophic collapses of broadcast masts and towers, "Unheard Of: The Catastrophic Collapse of the World's Tallest Tower - 99% Invisible", "Maszt Radiowy w Konstantynowie (Gąbin, Polska) - najwyższa budowla na świecie", "Evaluation of multiple ground flash charge structure from electric field measurements using the local lightning detection network in the region of Warsaw", "Radiowe Centrum Nadawcze w Konstantynowie", "Konstantynow Radio Mast, Gabin - SkyscraperPage.com", "Marian Siedlarek o windzie na maszcie w Konstantynowie / Maszt w Konstantynowie", "The tallest structure in the world which collapsed in 1991", "The Battle For Brown Boveri. The vertical steel tubes forming the vertices of the mast had a diametre of 245 millimetres (10 in); the thickness of the walls of these tubes varied between 8–34 mm (0.31–1.33 in) depending on height. Any cracks were then fixed by welders from Mostostal Zabrze by making patches out of sheet metal.[7][8][9]. [7][23], At 16:00 UTC on 8 August 1991 a catastrophic failure led to the collapse of the mast. There are over 50 radio structures in the United States that are 600 m (1968.5 ft) or taller. Safety was a priority, so "Alimak" had a safety procedure, where it could be stopped, but this precaution never had to be used. Some have visited the remains of the mast on anniversaries, such as the 20th anniversary in 2011. Masts are often named after the broadcasting organizations that originally built them or currently use them. If a crack was found, the transmitters were turned off and the Raszyn radio mast took over the broadcast. However, the radio mast collapsed in 1991. 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