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Concept
Riga Radio and TV Tower
Summary
The Riga Radio and TV Tower (Rīgas radio un televīzijas tornis) in Riga, Latvia is the tallest tower in the European Union. It was built between 1979 and 1989 with funding from the central government of the Soviet Union. Its highest point reaches , which makes it the third tallest tower in Europe (after the Ostankino Tower at and the Kyiv TV Tower at ) and the 15th tallest self-supporting tower in the world.
There was a restaurant, "Vēja roze" ("Wind Rose"), at the level, which was open since the completion of the tower until 2006. There is a public observation platform just above it at , from which most of the city and surroundings and the Gulf of Riga can be seen.
Since May 2019, the tower has closed to visitors for about five years for the renovation and expansion of the visitors' area and the adjacent territory under the TV Tower 2.0 project. It is planned to re-open in 2023 when there will again be a restaurant and the tower's bomb shelter will open to the public. A 500 kg Foucault pendulum will also be installed. The estimated costs are €40-50 million.
The design chosen for the tower was that of Georgian architect Kims Nikurdze. Also credited are Nikolajs Sergijevskis and Viktors Savčenko. Construction materials included dolomite from Saaremaa, Karelian granite, and ironwork that had been prefabricated in Chelyabinsk. The assembly was done by the St Petersburg North-western Ironwork Assembly Trust.
The tower is built on an island called Zaķusala (English: Hare Island) in the middle of the River Daugava, and the base of the tower is located about above mean sea level. The tower is built to resist winds up to without any noticeable vibration with the help of three dampers installed at the level. Though seismic activity is rare, the tower was designed to withstand a magnitude 7.5 earthquake. The projected service life of the tower is 250 years.
The support section of the tower rises the first , comprising the three pillars that give the tower its unusual appearance, and a central building that contains offices and machine rooms.
Official source
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