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99% Invisible-52- Galloping Gertie

2012-04-18 | 🔗

Even during the construction of the original Tacoma Narrows Bridge, the deck would go up and down by several feet with the slightest breeze. Construction workers on the span chewed on lemon wedges to stop their motion sickness. They nicknamed … Continue reading →

This is an unofficial transcript meant for reference. Accuracy is not guaranteed.
We get support from you, see Davis globally, ranked university working to solve the world's most pressing problems in food, energy, health, education and the environment. You see Davis, researchers, collaborate and innovate in California in around the globe, define transformational solutions it. A part of the universities mission to promote quality of life for all. Thanks find out more. The twenty first century. Die you see, Davis Don T do. Mrs ninety, nine percent- invisible, I'm roman Mars, The thing about being wrong is that, before you know, you're wrong, it feels exactly like being right. Failure that we are wrong. We wouldn't be wrong, nobody's committing intentionally to a false belief about the world. If they are there not wrong there.
A burly lying even during the construction of the original Tacoma narrows Bridge, which was to become the third longest suspension bridge in the world. It seem like something was wrong. Lilies in hindsight seems like it should have felt that way, but that's not how being wrong works. If you grow up like added watching Warner Brothers cartoons with three children, author of be wrong ventures in the margin of error. The Sunday morning cartoon moment where the road runners dashing of the cliff and courteous following him and cross, the road runner can fly in the Kyoto can't and there's this great moment where his run off the cliff, but he has not yet realised that you know he's there's no solid ground underneath him and the moment when we are wrong about something, but before we realised that is like that Mamma and we think that our belief is rock solid. We think we have in our all of the facts in the world bolstering asked we feel like our rights was budget bridge is not going to go
We have not yet look down and realise that looks that's not the case. Then it sounds crazy, but even during its construction, the deck of the commoners bridge would go up and down by several feet with the slightest breeze construction work, There is on the spanish outta women wedges to stop motion sickness, but construction continued, because the bridge have been designed specifically to withstand winds up to one hundred and twenty miles per hour. So everyone thought everything would be fine. Well, almost everyone, the original to commoner. Bridge, designed by Clerk Eldridge, was pretty conventional suspension bridge but was later modified by Lee unmoistened to be slimmer, more elegant. The most notable change was the twenty five foot lattice stiffening trusses, underneath the bridge on the original droids or replaced with an eight foot solid steel.
Plate, girder the new, solid garter along the side and moisten design made from much lighter. Slimmer and more flexible bridge. It also got the win like a sale, but they didn't know that Moises Design was also two slash three, the price of the original Eldridge Design, and that fact Only one the day, Eldridge and others day. Engineers were said to a protest in, but it didn't matter the original to common errors, bridge open to the public on July. First, nineteen, forty from a day it when it was prone. Having these oscillations ease, longitudinal waves of the bridge step, that's our after a disaster. John more and I write on various murders and disasters another on Sunday, Tom do you suppose ASEAN called murderer can be fun about these sundry topics. He wrote about the two common areas bridge years ago. The workers on the bridge had nickname galloping gurdy that give quickly
became the bridges, artificial, unofficial name. Even light wins caused the roadway to ripple with longitudinal no waves. Some five feet high, say to Washington was unconcerned about this, but not like it. So they were like looking at dumb various things to reduce the motion had tried some tie down cables and installing a damper and various other things, none of which the word again, the robot seem like he could handle the waves just fine. There were confident in the structural integrity to bridge the bridge she was a solid as the air underneath wily E Coyote's feet. When you watch film of the waves travelling down the bridge is funny the fact that the bridge state open at all really illustrates how, local governments and changed since nineteen forty. That thing would never stay open. Today, If you were sitting in a car on the bridge when the waves were going, the cars and funding with Bob up and then disappear completely.
From view trail, like Israel, tries people lecture leave for this, the feeling of riding on this bouncing bridge. The right ended just four months later non legal base and the wind began to speak with a law that no man can fail to do. It was clear early on the morning of November, seventh, at the gale force. Winds were having a greater effect on the bridge than ever before. Previously, these source of waves on the bridge have been like a fairly transitory here to bounce out for a couple minutes, but this was just going on and on so they thought this could be problematical, although they had seen actually deeper waves on the bridge but then the movement change things just got worse. The bridge begin to twist
silently along the seminar in that became like extremely violent one at the bridge, deck was up to forty five degree angle in supporting my one hour day, severed family life. Remember we replica you wouldn't believe palpable ever been gyrate like a nightmare. I want the river what thing burning early by this time everyone had gotten the blunt solid edge of the bridge disrupted the flow of the strong when causing one part to twist up, while the other section twisted down in it continued this torsional back and forth for over an hour. So there is plenty of time for spectators. They come watch, including the bridges original designer Clark. Eldridge, a local can restore learning Barney Elliot, arrive on the scene and took the now famous color film, of the bridges, relentless Jerry, No, you can't be confirmed by defining the over the entire peoples, not like
now about divided over the course of the debate on climate with the youth of solid birder, others differ, but whatever the reason the coma will rebuild this time, a bridge that will not provide a worthwhile. In my new Before the collapse bridge aerodynamics and structural failure due to torsion had scarcely then considered, or maybe those lessons have been lost and the rapid evolution of more and more slender and longer bridges, but the failure caused the study of bread. Aerodynamics to take off in any bridges that we're on the drawing board and nineteen. Forty or He designed with more conservative, deep, open trust, deck structures.
The lead design early. I myself and his solid steel IBM received most of the blame for the disaster. He never designed another bridge again due in no small part to the fact that he died three years later, no one was killed on the bridge. You people were very lucky to get away with their lives, because I just imagine you're on this bridge and twisting, at forty five degree angli flying to walk off in a fairly stiff wind. The only casualty was a dog. The local
We remain name Leonard coach worth drove his car, just passed the EAST tower when the twisting started got bouncing so hard. He couldn't controllers car anymore, but tilting bridge through his car into the side curve. And yet his daughters, dog, Cocker Spaniel, named Tubby with coats worth, gets out of his wrecked vehicle and gets thrown face down on the curb the dogs completely freaked out. You can get the dog out. He hears the concrete cracking beneath. Can he barely makes it a safety in engineering? Professor studying the bridge name for cars, ventured out to get Tubby right when the bridge was about to fall into the sound, but when he reached into the car Toby Bedroom the dough it was as to freaked out to leave the vehicle. There's amazing film of FARC arson stumbling back ass best. He could sticking to that middle yellow line as the bridge rocked wildly along its centre access so tat. It was the only casualty and forgetfulness second got appetite daughter. This.
Coach with was quoted immediately after the collapse saying with a real tragedy, disaster and black the dreams. All around me. I will leave that right at this minute. What appalls me most is that within a few hours, I must tell my daughter that her dog is dead when I might have saved There's no,
that is a completely unrelated addendum that will serve as a valuable life lesson to any ninety nine percent. Invisible fan. Here's John Mark it so years ago I went to the Portland ASEAN Symposium to do a seminar on research basins, research base, means like research base, blogs or bad casts, have always been a bit in the minority anyway and was held in this building called the Micro Psmith, immoral State union building on the porters at university. It was very first thing I did it. I got through the class and said okay, this panels, Held in the Michael Smith, Memorial Student Union Building,
does. Anyone who Michael Smith was no one did. Michael Smith, was the captain of the porters at university on college bolting. The college ball was televised trivia, competition, matching teams from various universities throughout the country, and he led Portland State University to the championship, which is incredible: accomplishments are beating out schools like harm earning ale and yes, important state as a state school is not the type of school they expect when something like this, I'm sure the elderly people were horribly embarrassed and is quite a big deal the time he also was suffering from cystic fibrosis and he would die three years after this. So everyone agreed. This is a good story. Mass me how'd. You find out about this. There's a plaque in front of the building, my slowly
as always, read the black ninety nine percent, invisible was produced this week by me, roman Mars. Especial thanks to John Mark of order can be fought and bellows of the website damn interesting. We are a project of El W. Ninety one point: seven local public radio in San Francisco and the american instead of architects in San Francisco support for ninety nine percent, invisible, as provided in part by tiny letter email for people. Something to say my boy as long as this would have the same asthma talk about is well plots in Ireland, robots, an old man suits. I would go to the news letter it for the easy, minimal, powerful the simplest way to write any mountains letter online.
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Transcript generated on 2020-02-15.