Eiffel Tower at France

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Eiffel Tower is an iron tower built on the Champ de Mars at the River Seine in Paris. The tower has become a global icon and one of France famous structure in the world. Tower at 300 meters was built in 1889 for the International Exposition, a symbol of Paris. The highest structure in Paris made of iron, this place was established in the tempo of two years and demonstrate progress in construction techniques. Named according to the designer, engineer Gustave Eiffel. More than 200,000,000 people have visited the tower since its development this year 1889, including 6,719,200 people in 2006, making the most visited of paying monument in the world. Including the antenna at 24 m (79 feet), this structure has a 325 m high (1,063 feet) since 2000, the same building with the conventional multistage 81.

When completed the tower built in 1889, this structure is to be the highest in the world, who kept the title until 1930 when the Chrysler Building in New York City (319 m - 1047 feet) is complete. The tower is now the fifth in France and the most high in Paris. Structure of iron Eiffel Tower weight 7300 tons while the entire structure including non-iron component weight 10,000 tons. Depending on the temperature, the peak towers to avoid the sun 18 cm (7 inches) due to expansion in the iron part facing the sun. The tower is also swinging 6-7 cm (2-3 inches) in a windy atmosphere.


The economize one is as a demonstration against the building, when 7300 tons of structural steel melted, it will meet the 125 square meters with a depth of 6 cm (2.36 inches), which means that 7.8 tons of iron per cubic meter. This tower has a mass less the mass of air in the cylinder with the same dimensions, at 324 meters and 88.3 finger-finger. Weight of the tower when compared to 10,100 tons with 10,265 tons of air.

First and second level can be accessed by stairs and lift. A ticket counter in the south tower to sell tickets to children in the household who started that place. At the first platform of the tower rising from the east and the meeting when the level can only be accessed by lift. From the first or second platform the stairs are opened for all people up and down depending on when they buy a lift ticket or a ticket stairs. Number of children there are 9 stairs to the ticket counter at the base, to level 328 first, 340 to the second level and 18 to the platform lift in the second level. When the lift out in the third level there are 15 children ascend the stairs to the top of the observation platform. Number of stair are gradually on the ladder to ascend the stairs marked.

Treatment consists of a tower of 50 to 60 tons of paint every seven years to guard from corrosion. To maintain the appearance of a visitor under the three different colors used on this tower, with a dark color under the light and color in the top . At the first level there are interactive consoles that let the color on the next painting. Eiffel Tower architect is emile Nouguier, Maurice Koechlin and Stephen Sauvestre.

This structure was built between 1887 and 1889 as the entrance of Exposition Universal. Eiffel actually planning to build the tower in Barcelona, for the Universal Exhibition in 1888, but the parties responsible in the Barcelona city hall thought that odd and expensive, and does not fit with the city. After rejecting the Plan Barcelona, Eiffel send the draft to the parties responsible for the Universal Exhibition in Paris, where he built the tower a year later, that was 1889. This tower was 31 Maret1889, and opened on 6 May.

Three hundred workers combine together the 18,083 iron (pure form of structural iron), using two and a half million nails, in the form of structural by Maurice Koechlin. This tower got many criticisms from the public when built, have a call with the eyes. At that time, daily newspapers filled with letters from the community of art critics in Paris. One of them included in the publication of U.S. Government Publications Office William Watson on the Paris Universal Exhibition: Civil Engineering, Public Works, and Arsitektur1892.

Eiffel has standing permission for 20 years, which means it must be dismantled year 1909, when ownership to be the Paris city, the government has planned dismantled it, but after the tower is evidently bring happiness in terms of communication, the tower is left standing after the permit is expired. Military to use it to set the taxi line in front of Paris during the First Marne Activists, and became the first victory monument.

When the tower was built with a lot of people is shocked to shape of a very height and more people are criticized for the design. The form of the tower had been declared with the mathematical calculation of the resistance to wind. Some theoretical calculations have been planned for many years, the latest is a nonlinear integral equation is different based on the balancing pressure of the wind on the tower with any tension between the construction elements at that time

Since the early 20th century, the tower has been used for radio transmission. Until the 1950s, a collection of cable extends from the tower to the meeting ended in the Avenue de Suffren and Champ de Mars. They connected with the long wave transmitter in a small bunker; year 1909, an underground radio center was built near the permanent south pillar and still have up to now.

Date 20 November 1913, Paris Observatory, using the Eiffel Tower as an antenna, to send signals wirelessly to the Observation Center for the United States Navy is using an antenna in Arlington, Virginia. Transmitting the object to measure longitude difference between Paris and Washington, DC

Monumentalize Gustave Eiffel tower in the name of seventy-two scientists, engineers and other people famous France. The names are removed in the early 20th century, but returned the year 1986-1987 by Société Nouvelle d'Exploitation de la Tour Eiffel, a company contracted to operate the business-related markets. Even this is human created but this is to be the one of nomination of new seven world wonder beside Komodo National Park, The Acropolis of Athens, The Alhambra at Granada City (Spain) and other.
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