Eiffel Tower

 Eiffel Tower (French: Tour Eiffel) is an iron tower with a height of 324 meters, there is in Paris, in the far north-west of Park Champ - de - March, near the River Seine. Created by Gustave Eiffel and his associates on the occasion of the International Exhibition of Paris in 1889, called Tower 300 meters in the opening, it became the origin code the French capital, a tourist site first: It represents the ninth site French the most visited in 2006, and is also the first teacher in terms of the number of visitors ; where the number of visitors 6.893 million visitors in 2007. Height of 313.2 meters, which remained Brkh Eiffel for 41 years the teacher highest in the world. Height has been increased several times installed many antennas, to a height of 327 meters since March 8, 2011. Used in the past in many scientific experiments, and is used today in broadcast radio and television programs.

Design and construction

Began construction in January 26, 1887, and lasted for 26 months with the participation of approximately 50 engineers and 300 workers; where it was in the first five months building the foundations while took to build the tower one and twenty months following the end of all business in the March 31, 1889. The tower was officially opened on May 6, 1889.

The period in which the construction 1887-1889 standard, and given the tools available in that era and compare it with the precision and magnitude that characterized this building.

Tower consists of a piece of iron 18.038 and 2.5 million total nail and weighs 10.100 tons, which is based on the four columns made ??up with each other base dimensions of 125 * 125 meters of any area of ??15.625 square meters (m 2)