Question

cual es la historia de la torre eiffel en ingles

Answer 1

Su historia es
On the occasion of the Universal Exhibition of 1889, the date marking the centenary of the French Revolution, a great contest in the French Official Gazette is published.
The bet was "studying the possibility of lifting on the Champ de Mars iron tower with a square base, 125 meters wide and 300 meters high." Selected from 107 projects were accepted by Gustave Eiffel, businessman, Maurice Koechlin and Emile Nouguier, engineers and Stephen Sauvestre architect.
The first excavations were carried out on 28 January 1887. On 31 March 1889 he completed construction of the tower in record time (2 years, 2 months and 5 days), which is a real technical feat considered
The plane Koechlin
The proposed 300-meter tower was born in connection with the preparation of the Universal Exhibition of 1889.

The two main engineers Eiffel, Maurice Koechlin and Emile Nouguier in June 1884 company had the idea of ​​a very tall tower, designed as a large pillar with 4 separate columns at the base by way of legs joined at the top , interconnected by girders arranged at regular intervals. The company had perfectly mastered the principle of the bridge supports. The tower project was an extension of this principle to a height of 300 meters, that is, the equivalent of the symbolic figure of 1000 feet of the bridge supports. The September 18, 1884 Eiffel patented "a new design that allowed to build stands and metal poles able to reach a height greater than 300 meters."

To make the project more acceptable face of public opinion, Nouguier Koechlin and Stephen Sauvestre asked the architect to work on the appearance of the project.

Sauvestre proposed pedestals in coated masonry, monumental arches legs to join the columns and the first level, large glass rooms on each floor, a design shaped bulb to the top and other ornaments to adorn the structure as a whole. Finally, the project was simplified, but certain elements such as the large arches of the base, which contribute to give its appearance so characteristic is preserved.

The curvature of the uprights is mathematically determined to offer the best possible resistance to the wind. In the words of Eiffel: "Hence the shear force of the wind passes through the inside of the uprights of the edges Tangents to studs at points located at the same height always end by cutting at point by passing the resultant. of the wind forces exerted on the part of the leg that is on top of the points in question. Before match at the top, the legs appear to emerge from the ground, and somehow molded by the wind. "