Continuation from an earlier post: How was the Eiffel Tower constructed? Part 2
Here is a reminder:
The Tower sways slightly in the wind. During the storm of 1999, it moved approximately 13 centimeters from its initial position.
But the Tower is also affected by heat. When the temperature is high, that portion of the structure exposed to the sun expands more than the portion in the shade. To “get out of the sun”, the Tower can lean as much as 18 centimeters.
The different coats of paint:
• During the construction – mainly in puddle iron with very low carbon content – the Eiffel Tower was given its first coat of paint in red iron ocher. Mr. Nourisson then had the second
and third coats applied in linseed oil. Painting was completed in March 1889.
• In May 1889, a glazed fourth coat was applied by the same contractor, Mr. Nourrisson; its reddish-brown color shaded off gradually from the base to the top. Guaranteed for one year, this
one coat alone cost 60,000 gold francs.
• In 1892, the paint job received its first cleaning. The contractor was Mr. Rivière. The previous coat was washed and a new coat of cher-yellow paint applied. The job cost 57,000 gold francs, but with maintenance guaranteed for five years.
• In 1899,it was decided that the Eiffel Tower would be repainted every seven years.
• Since 1988, climbers with video cameras have been monitoring the condition of the paint in those areas most difficult to access.
• December 2001 saw the beginning of the 18th painting of the Eiffel Tower since its construction. For the first time, a new lead-free paint was used, in the interests of protecting the environment. A new timetable was adopted.
Key figures behind the painting of the Eiffel Tower:
• Weight of paint: approximately 60 tons
• Time required: 15 to 18 months
• Frequency required: the Tower is entirely re-painted every 7 years. The 19th painting is scheduled to begin autumn 2008 and finish at the beginning of the year 2010.
• 25 painters
• Cost of the 18th painting in 2001: 3 million euros
This is the end of How was the Eiffel Tower constructed? Part 3, we will continue later on on Part 4!