The Eiffel Tower

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Construction work for two years, two months and five days (from January 28, 1887 on March 31, 1889) was performed 300 workers. Record time erection drawings facilitated extremely high quality with exact dimensions over 18,038 metal parts, which are used for assembling 2.5 million zaklopok.Opory bashniChtoby finish tower at the appointed time, the Eifel applied, for the most part, the prefabricated parts. Rivet holes were drilled at the intended places in advance, and two-thirds of the 2.5 million rivets were fixed in advance. None of the beams are not harvested weighed more than 3 tons, which greatly facilitates the raising of the metal parts in the provided space. In the beginning there is a high cranes and construction grew when their height, specially designed work adopted Eiffel mobile cranes. They moved on rails laid for future elevator.