Transcript Eiffel Tower.

performed by
Pastuhov Artyom
10 a class
Eiffel Tower (Fr. la tour Eiffel) - the most recognizable
architectural landmark of Paris, the world-famous as a symbol
of France, named after its designer Gustave
Eiffel. Eiffel himself called it simply - the 300-meter
tower(tour de 300 mètres).
In 2006 the tower was visited by 6,719,200 people, and its
history until December 31, 2007-236 445,812 people. That
is, the tower is the most visited and most
photographed attraction in the world. The symbol of Paris was
conceived as a temporary structure - a tower served as the
entrance arch of the Paris World Exhibition in 1889. From
the demolition of planned (20 years after the show) radio
antenna tower saved, mounted on the top - it was the epoch
of the introduction of radio.
construction
Construction work for two years, two months and five days
(January 28, 1887 to March 31, 1889) served as 300
workers. Record time contributed to the construction of
extremely high quality drawings with exact dimensions of
more than 18,038 metal parts, which are used to build 2.5
million rivets.
Weight metal construction - 7300 t (total weight of 10 100
t). Today, this metal could build just three towers. The
foundation derived from the concrete sets. Fluctuations in the
tower during the storms do not exceed 15 cm
The ground floor is a pyramid (129.2 m each side of the base),
formed by four columns, joining at a height of 57.63 meters
curved arch, the vault is the first platform the Eiffel Tower. The
platform is a square (65 m in diameter).
On this platform rises a tower of the
second pyramid formed by four as
columns, joining arch, which is (at an
altitude of 115.73 m), the second
platform (the square of 35 m
in diameter).
Four columns, rising to the second platform,
and gradually approaching pyramidal
intertwined to form a huge pyramidal tower
(190 m), carrying on a third platform (at an
altitude of 276.13 m), and a square (16.5 m in
diameter) on the It stands a lighthouse with a
dome, on which at an altitude of 300 meters
is a platform (1.4 m in diameter).
Lead to the tower stairs (1792 steps) and
elevators.
The first platform was built rooms of the
restaurant, on the second platform were
placed in tanks with machine oil to the
hydraulic hoist (lift) and a restaurant in a
glass gallery. On the third platform located
astronomical and meteorological observatory
and physical study. The light beacon was
visible at a distance of 10 km.
Under the first balcony, on all four sides of the parapet are
engraved the names of 72 prominent French scientists and
engineers, as well as those who have made special contribution to
the creation of Gustave Eiffel. These inscriptions have appeared in
the early XX century and was restored in 1986-1987 by «Société
Nouvelle d'exploitation de la Tour Eiffel», hired for the operation
of the Municipality the Eiffel Tower. The tower itself is owned
by the city of Paris.