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Old March 13th, 2007, 09:21 PM   #41
Obelixx
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@jacekq: It seems to be a Polish equivalent to the German "Typentürmen", which are desribed well on http://de.wikipedia.org/wiki/Typenturm . What these Polish towers makes very remarkable, is that they have only a small or even no antenna mast on its top.

Is there a public observation deck on Rabka TV Tower?


Rabka TV Tower ( http://emi.emitel.pl/EMITEL/obiekty....biekt=DODR_S4D )
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Old August 20th, 2007, 12:51 PM   #42
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[RCN Konstantynow] - Videos from former 646 metre mast

You should view the following videos of former 646 metre mast Konstantynow

http://pl.youtube.com/watch?v=sz80ml...elated&search=
http://pl.youtube.com/watch?v=P7HdcD...elated&search=
http://pl.youtube.com/watch?v=hpzYuf...elated&search=
http://pl.youtube.com/watch?v=2lBXPO...elated&search=
http://pl.youtube.com/watch?v=5ZrTa9...elated&search=
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Old August 24th, 2007, 02:37 AM   #43
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thank you Obelixx.
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Old December 10th, 2007, 03:43 PM   #44
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See also http://picasaweb.google.com/masabaj/...64638M19741991
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Old December 17th, 2007, 11:20 PM   #45
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On http://forum.tutej.pl/viewtopic.php?p=101890 you can find some sites of concrete towers similiar to that build at Piatkowo. Towers of this type were obviously built at:
* Piatkowo
* Zygry
* Jemiolow
* Bolewice
* Zerkow
* Chelmce

Where else also?
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Old December 20th, 2007, 12:05 AM   #46
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jest to aktualnie najwyższa ukończona konstrukcja stojąca kiedykolwiek na świecie.

Quote:
Maszt radiowy w Konstantynowie

Maszt radiowy w Konstantynowie – maszt radiowy nadajnika długofalowego, Programu I Polskiego Radia, zwany również "Masztem w Gąbinie". Najwyższa konstrukcja w dziejach świata i najwyższa konstrukcja na świecie w latach 1974-1991.
Wciąganie wiechy.
Wciąganie wiechy.
Oficjalny opis masztu
Oficjalny opis masztu

Zbudowany na ogromnym porcelanowym izolatorze, podtrzymywany był przez 15 odciągów stalowych zamocowanych na 5 poziomach. Wewnątrz konstrukcji znajdowała się winda napędzana silnikiem spalinowym, stosowana do przewożenia pracowników obsługi technicznej i konserwatorskiej. Wysokość masztu winda pokonywała w 30 minut.

Nieprzemijającą zaletą masztu i nadajnika w Konstantynowie była możliwość bezpośredniego odbioru z klasycznego radioodbiornika (AM) programu pierwszego Polskiego Radia przez rodaków w Kazachstanie, pracowników polskich firm pracujących w Iraku, Iranie i prawie całej powierzchni Europy.

8 sierpnia 1991 runął z powodu zerwania się jednego z trzech najwyższych odciągów w czasie prac konserwatorskich. W katastrofie nikt nie doznał uszczerbku na zdrowiu.

W wyniku protestów mieszkańców okolicznych miejscowości maszt nie został odbudowany.

Obecnie najwyższym masztem jest KVLY/KTHI TV Mast.

Dane techniczne

* wysokość: 646,38 m
* masa: 420 t
* moc nadajnika: 2 MW
* lokalizacja: Konstantynów (powiat płocki) k. Gąbina (52°22'14" N 19°48'23" E)
* projektant: Jan Polak
* wykonawca: Mostostal Zabrze

Kalendarium

* 1970 - rozpoczęcie budowy radiostacji
* 1972 - rozpoczęcie budowy masztu
* 18 maja 1974 - ukończenie
* 30 lipca 1974 - oficjalne uruchomienie radiostacji
* 8 sierpnia 1991 godz. 18:00 lub 19:10 - katastrofa
* 4 września 1999 - oddanie do użytku następcy: dwóch masztów w Solcu Kujawskim koło Bydgoszczy o wysokości jedynie 330 oraz 289 metrów



and version for our english friends :

Quote:
Warsaw radio mast

The Warsaw radio mast was the world's tallest structure until its collapse on August 8, 1991. Until the advent of the Burj Dubai it was the tallest land-based structure ever built.

Warsaw Radio Mast, which was designed by Jan Polak, was 646.38 metres (2,120.67 ft) tall. Its construction started in July 1970, and was completed on May 18, 1974, and the transmitter that used it entered regular service on July 22 of the same year. It was located in Konstantynów, Gąbin, Poland, and was used by Warsaw Radio-Television (Centrum Radiowo-Telewizyjne) for longwave radio broadcasting on a frequency of 227 kHz (before February 1, 1988) and 225 kHz (after). Because a voltage potential of 120 kV existed between the mast and ground, it stood on a 2 metre high insulator. It operated as a mast radiator, so its height was chosen in order to function as a half-wavelength antenna at its broadcasting frequency. The signals from its 2 megawatt transmitters could be received across all of Europe, North Africa and even in North America. Its weight is debated: 380 tonnes, 420 tonnes, 550 tonnes and even 660 tonnes have been cited, probably the result of inaccurate conversion of units by translators. Polish sources claim 420 metric tonnes.

Construction

The Warsaw radio mast was a guyed steel lattice mast of equilateral triangular cross section, with a face width of 4.8 m. The vertical steel tubes forming the vertices of the mast had a diameter of 245 millimetres; the thickness of the walls of these tubes varied between 8 and 34 millimetres depending on height. The mast consisted of 86 elements, each of which had a length of 7.5 metres. The mast had 3 arrays of guy wires, each attached to the mast at 5 levels. Each guy was fixed on a separate anchor block at the ground and was 50 mm in diameter. In order that the guy wires not interfere with the radio transmissions, the guys were insulated at regular intervals. The weight of guys and insulators used for anchoring the mast was 80 metric tons. An elevator and separate protected ladders were installed in the interior of the mast to facilitate access to the various mast components, including the aircraft warning lamps. The elevator had a maximum speed of 0.35 m/s and required 30 minutes for a trip from the bottom of the structure to the top.

In the lower half of the mast, there was a vertical steel tube, attached to the mast's outer structure with large insulators. This tube was grounded at the bottom, and connected electrically to the mast structure at half the total height. This technique works by applying a DC ground at a point of minimum radiofrequency voltage, conducting static charge to ground without diminishing the radio energy. Static electrical charge can build up to high values, even at times of no thunderstorm activity, when such tall structures are insulated from ground. Use of this technique provides a certain amount of lightning protection.

A special overhead radio frequency transmission line was used to transfer the signal from the transmitter building to the mast. The transmitter building had a volume of 17,000 cubic metres and was approximately 600 metres from the mast. The transmitter consisted of two 1000 kilowatt units built by Brown Boveri and Cie. An atomic clock was used to generate the transmission frequency in order to provide a very accurate, stable signal source which could be used as a frequency standard by anyone within signal range. The station, which had an area of 65 hectares, also contained a 76 metre tall lattice tower of rectangular cross-section. This tower was used to provide a radio link for programme feeds from the studio.

To supply power to the station a 110kV substation was built. The substation was over-engineered due to the strategic importance of the station as Poland's central transmitter. Although the power consumption of the transmitting station was large (estimated 6000 kW), the substation was capable of supplying much more than was required.

Small towers were erected around the periphery of the station's grounds in order to support aircraft warning lamps where the guy ropes were located. For photo see:[1]

The official name of the facility was Radiofoniczny Ośrodek Nadawczy w Konstantynowie (Radiophonic Transmission Center Konstantynow), Radiowe Centrum Nadawcze w Konstantynowie (Radio Transmission Center Konstantynow) or Warszawska Radiostacja Centralna (WRC) w Gąbinie (Warsaw Central Radio Station Gabin). The radio program was called "Program Pierwszy Polskiego Radia", "Program I PR" or unofficially "Jedynka".

Approximately ten years after completion of the mast, inspections revealed structural damage caused by wind-induced oscillations at the mast, the backstage insulators and the guys. Repair work was very difficult and replacement of the mast by a stronger construction of the same height was considered. However, this was not realized, as a result of Poland's economic situation. In 1988 the mast was repainted, but this could not be done to the desired extent, as there was not enough paint available.

Collapse

On August 8, 1991 at 16:00 UTC the mast collapsed due to an error in exchanging the guys on the highest stock of the mast. The mast first bent and then snapped at roughly half its height. A small mobile crane, property of Mostostal Zabrze, was destroyed in the collapse. The helix building and the transmitter building (including the transmitter devices in it) were not damaged.

An investigating committee determined that blame lay with Mostostal Zabrze, which built and maintained the mast. The construction coordinator and the chief of the Mostostal division that built the mast were accused of causing the collapse. The former was sentenced to 2.5 years, the latter to 2 years.

Since the time of the collapse of the Warsaw radio mast, the tallest structure in Poland has been the transmission mast for FM radio and TV at Olsztyn-Pieczewo with a height of 360 metres (coordinates: [show location on an interactive map] 53°45′13″N, 20°30′57″E).

After the collapse, the KVLY-TV mast outside Fargo, North Dakota, USA, regained its title as the world's tallest structure, standing 628.8 m (2,063 feet). This is expected to be surpassed by Burj Dubai.

Replacement

After the collapse of the radio mast at Konstantynów, the Polish broadcasting company used the old transmitter of Raszyn with its 335 metre high mast near Warsaw, which had been used since 1978 during the day for the transmission of a second programme of the Polish broadcasting service in the longwave range on the frequency 198 kHz, for transmissions on 225 kHz with a power of 500 kilowatts. It is not possible to transmit from Raszyn on 198 kHz and 225 kHz simultaneously, so the transmissions on the second long wave frequency 198 kHz had to be discontinued until either a second long wave broadcasting transmitting facility was built in Poland or a special frequency switch, which would allow transmissions on both frequencies, was installed at the Raszyn transmitter. The latter, simpler solution would have decreased the effectiveness and reliability of both transmitters and was therefore found unacceptable.

Because the Polish long wave transmitters are of special importance to Polish people abroad, as early as April 1992 the Polish government planned to rebuild the mast at Konstantynów. In September 1995 the Polish government was set to rebuild the mast. Although refurbishment of the old basements, which could be reused, had already started, the rebuilding of the mast had to be cancelled due to protests of people living in the surrounding area, who claimed that radiation from the mast was a health hazard. While the accuracy of these claims has not been verified, a new site for the transmitter was sought. One was found in the form of an old military area just southeast of Solec Kujawski, where from 1998 to 1999 a new longwave transmission facility was built with a transmitter of 1200 kW output power for the frequency 225 kHz. This facility, which was inaugurated on September 4, 1999, uses as aerials two grounded, upfeed masts, which are 289 metres tall and 330 metres apart.

After the inauguration of the transmitter at Solec Kujawski, the transmitter at Raszyn was again used for transmitting on the frequency 198 kHz for the programme Radio Parliament.

Current state of site

Except for the mast and the radio frequency transmission line that led to it, nearly all components of the facility remain in place, unused and slowly deteriorating.

From the mast itself, the basement, the anchor blocks and the hole in the ground, at which the insulated mounted steel tube in the mast ended, are still there.

In popular culture

The Warsaw radio mast was mentioned in Guinness World Records as the world's tallest structure. It was also shown on local postage stamps.

www.wikipedia.com
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Old December 20th, 2007, 01:02 PM   #47
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Po angielsku jest nawet więcej niz po polsku.
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Old December 20th, 2007, 06:41 PM   #48
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nawet 2x wiecej

dla mnie to nieprawdopodobne, że właśnie w Polsce istniała najwyzsza kiedykolwiek ukończona konstrukcja na świecie
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Old December 20th, 2007, 07:37 PM   #49
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The radio mast at Konstantynow was not free-standing ( the subject of the thread are free-standing towers in Poland)

But I want to pay your attention to a special feature. When you look at the following picture of the radio mast at Konstantynow, you can see left of the mast a small tower and you mask what is its use.



This little tower, which is still standing, is a signal tower, carrying a flight safety lamp on its top, in order to mark the area where the guys of Konstantynow radio mast were spun. A closeup-view of this little tower can be found on http://picasaweb.google.com/masabaj/...83273307806562 .
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Old December 20th, 2007, 09:00 PM   #50
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Quote:
Originally Posted by vangraaf View Post
nawet 2x wiecej

dla mnie to nieprawdopodobne, że właśnie w Polsce istniała najwyzsza kiedykolwiek ukończona konstrukcja na świecie
Mozna psioczyc na PRL, a nawet trzeba za jego zbrodnie, ale spogladajac obiektywnie i porownujac relatywne mozliwosci teraz i wtedy to wychodzi ze panstwo polskie ma mniejsza "moc tworzenia" niz mialo kiedys.
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Old March 24th, 2008, 08:02 PM   #51
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Ja Wam mówię, że jak zgaśnie światło, a z głośników przestanie lecieć ESKA to będę wiedział, że atak terrorystyczny ze zwiadem Obelixxa właśnie się zaczął.
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Old March 25th, 2008, 04:46 AM   #52
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Thank you Obelixx.
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Old March 25th, 2008, 02:13 PM   #53
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Obelixx. Although I think you might be working for al-quaida, I very much like your topics
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Old April 28th, 2008, 10:14 PM   #54
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Catastrophic collapses of architectural structures in Poland

Let us make a list of remarkable catastrophic collapses of architectural structures of any kind in Poland.

I know these:
* August 8th, 1991: collapse of Konstantynow Radio Mast during exchange of guy of upmost guy level
* January 28th, 2006: collapse of fair trade hall at Kattowice as result of high snow load. 60 persons killed

I assume, there were many other catastrophic collapses of structures in Poland and I assume, that many such accidents were tried to keep secret during communist era.

Last edited by Obelixx; April 28th, 2008 at 10:52 PM.
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Old April 28th, 2008, 10:47 PM   #55
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I just hope you are not planning another one

* April 17th, 1995. Gas explosion in a block of flats in Gdansk. 22 dead, 12 injured

Last edited by Rook Dio; April 28th, 2008 at 10:53 PM.
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Old April 28th, 2008, 10:49 PM   #56
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I heard about one serious in 1966 in former Wrocław Agricultural Academy - 10 people died. And one detail - city name is Katowice, not Kattowitz.

Last edited by 6985; April 28th, 2008 at 10:52 PM. Reason: mistake
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Old April 28th, 2008, 10:51 PM   #57
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Quote:
Originally Posted by Rook Dio View Post
I just hope you are not planning another one

* Wybuch gazu w wieżowcu w Gdańsku 17 kwietnia 1995. W wyniku katastrofy zginęły 22 osoby a 12 zostało rannych.
Keeping this info in English would help to understand it for Obelixx I believe.
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Old April 28th, 2008, 11:01 PM   #58
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There was also a gas explosion in PKO Rotunda Bank (Warsaw, 1979) 49 killed and 110 injured. Does it count?
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[Warszawa] Miasto Feniksa
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Old April 28th, 2008, 11:16 PM   #59
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You can post any remarkable structural collapse, which occured in Poland. I believe it will be not easy, as during communist era one tried to keep such disasters if possible as secret as possible.
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Old April 28th, 2008, 11:44 PM   #60
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Quote:
Originally Posted by Ka-8 View Post
Keeping this info in English would help to understand it for Obelixx I believe.
but it is, you need to refresh your browser from time to time..
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