Eiffel Tower: 18,038 Iron Parts, 2.5 Million Rivets, Zero Room for Error

18,038 iron parts. 2.5 million rivets. Every rivet hole positioned to within 1 millimeter. This is the story of how the Eiffel Tower was built in about 26 months, and how it became the tallest structure on Earth. The tower rose for the 1889 World's Fair with a permit for just 20 years. It was scheduled for demolition in 1909. What saved it was radio telegraphy, and today it stands 330 meters tall over Paris. In this video, we break down how about 300 workers on site assembled a 300-meter iron tower with 1860s-era tools, why precision made it possible, and how the Eiffel Tower held the title of the world's tallest structure from 1889 to 1930. 🔔 Subscribe for more deep dives into the greatest engineering achievements on Earth — every week, a new impossible structure. Timestamps: 00:00 Paris, January 1887: The Impossible Deadline 0:52 The Scale: 300 Meters vs. Everything in Paris 1:51 The Problems: Wind, Time, Precision 2:56 5,329 Drawings for 18,038 Pieces 3:18 The Wind Trick: A Curve and a Lattice 4:14 The Wrong Answer: Just Work Harder 5:39 The Real Mechanism: Eiffel's Factory 7:03 Assembly on Site: How the Rivets Went In 8:03 Building Up: First Floor to 300 Meters 9:25 March 31, 1889: Finished 10:17 The 20-Year Permit and the Demolition Date 11:11 The Skeptic's Point: Iron Moves 13:04 How Radio Saved the Tower 14:03 Adding It All Up 15:09 Eiffel's Apartment and Edison #Engineering #Megaprojects #EiffelTower #Paris #Impossibuilt #howtheybuild