Eiffel+Tower

> Ah, bien je prétends que les courbes des quatre areêtes du monument, telles que le calcul les a fournies, donneront une grand impression de force et de beauté. > Well, I think the curves of the four pillars of the monument, as the calculations have provided them, give it a great sense of force and beauty. — [|Gustave Eiffel]

[|The Eiffel Tower] was built by Gustave Eiffel for the 1889 Exposition Universelle, which was to celebrate the 100th year anniversary of the French Revolution. Its construction in 2 years, 2 months and 5 days was a technical and architectural achievement of French engineering. It marked a defining moment of the industrial era.
 * Tall : 324 metres (with its antennas)
 * Weight : 7,300 tonnes of metallic framework, and a total weight of 10,100 tonnes
 * Number of metallic parts : 18,000 metallic parts joined by 2,500,000 rivets
 * Surface to be painted : 250,000 m2 of surface to be painted during each painting campaign, every 7 years. 60 tonnes of paint are needed

centroid, center of mass

[|Eiffel Tower]
 * It was designed at home, on the kitchen table...
 * by someone who didn't get their name on it
 * Never been done before, not guaranteed to get built or to work
 * It was criticized by hundreds of leading intellectuals and cultural experts
 * It wasn't supposed to last very long
 * It's designed to be an icon, it's not an accident
 * People flock to it because it's famous
 * You can sketch a recognizable version of it on a napkin


 * What's the problem?**
 * **Ask** - What are some of the characteristics of the Eiffel Tower that makes it so famous?
 * **Imagine** - Where is the center of mass? Why is this important?
 * **Design, Build** - Why did they build it with iron? What are the problems
 * **Improve** -


 * That's engineering**


 * Engineering ideas**

Here are some challenges for you to work on...
 * Do it**


 * News, updates**


 * Learn more...**
 * [|Gustave Eiffel biography

..r1