this post was submitted on 29 Aug 2025
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Construction began in September 1938. From the time the deck was built, it began to move vertically in windy conditions, so construction workers nicknamed the bridge "Galloping Gertie". The motion continued after the bridge opened to the public, despite several damping measures. The bridge's main span finally collapsed in 40-mile-per-hour (64 km/h) winds on the morning of November 7, 1940, as the deck oscillated in an alternating twisting motion that gradually increased in amplitude until the deck tore apart. The violent swaying and eventual collapse resulted in the death of a cocker spaniel named "Tubby", as well as inflicting injuries on people fleeing the disintegrating bridge or attempting to rescue the stranded dog.

Gif converted by Satcom Guru.

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[–] Treczoks@lemmy.world 43 points 1 month ago (1 children)

Also called "The most expensive training film for civil engineers".

[–] Zombiepirate@lemmy.world 39 points 1 month ago (1 children)

I'm sure it really resonates with them though.

[–] Wytch@lemmy.zip 33 points 1 month ago (1 children)
[–] binarytobis@lemmy.world 17 points 1 month ago* (last edited 1 month ago) (1 children)

“My dog Tubby died.”

“Oh no! What happened?”

“A bridge collapsed.”

“How tubby was he?!”

[–] Dentzy@sh.itjust.works 4 points 1 month ago

I hate you, you made me laugh at poor Tubby's death 😂

[–] TomMasz@piefed.social 27 points 1 month ago

Construction began in September 1938

Destruction began in November 1940

[–] ArseAssassin@sopuli.xyz 21 points 1 month ago* (last edited 1 month ago) (2 children)

The video showing people calmly walking away as the bridge is wobbling is fucking wild. Check 0:56.

[–] Nollij@sopuli.xyz 27 points 1 month ago

I'm sure they were locals, and this was just another day. It had been swaying for months without any issue, why would today be any different?

What's really wild is that, in 1940 when cameras were still limited, they happened to be filming - from multiple angles - at the exact moment it collapsed.

[–] Zombiepirate@lemmy.world 6 points 1 month ago* (last edited 1 month ago)

Also, the guy walking on it at 1:10. Wonder if it's the same guy as in the gif?

[–] BackgrndNoize@lemmy.world 19 points 1 month ago

the bridge collapsed because moderate winds produced aeroelastic flutter that was self-exciting and unbounded: for any constant sustained wind speed above about 35 mph (56 km/h), the amplitude of the (torsional) flutter oscillation would continuously increase, with a negative damping factor, i.e., a reinforcing effect, opposite to damping.[5] The collapse boosted research into bridge aerodynamics-aeroelastics, which has influenced the designs of all later long-span bridges.

[–] BeefandSquints@lemmy.dbzer0.com 11 points 1 month ago (1 children)

I used to drive over the Tacoma bridge pretty often!

[–] TomMasz@piefed.social 8 points 1 month ago (3 children)

They learned from their mistakes.

[–] ZombiFrancis@sh.itjust.works 8 points 1 month ago

There's now two and a toll.

[–] homesweethomeMrL@lemmy.world 8 points 1 month ago

After they didn’t listen to the guys who knew better and blew the state's money anyway.

Nothing changes.

[–] BeefandSquints@lemmy.dbzer0.com 5 points 1 month ago

Proof that it is, in fact, possible!

[–] UnderpantsWeevil@lemmy.world 7 points 1 month ago

Someone found the next episode of "Well There's Your Problem".

[–] PugJesus@lemmy.world 5 points 1 month ago

Bridge lasted for less than two years, great use of resources!

[–] aeronmelon@lemmy.world 5 points 1 month ago

Guy: “Naw, fuck that.”

[–] anon6789@lemmy.world 5 points 1 month ago* (last edited 1 month ago)
[–] powdermilkman@piefed.ca 5 points 1 month ago (1 children)

I think about that video every time I'm in traffic going over the bridge that replaced it. Not that I don't have faith in modern engineering (not so much in the upkeep of infrastructure in this country) but still, can't help but think about it as I feel it shake.

Fun fact about Washington (Puget sound) bridges, we have 4 of the 5 longest floating permanent bridges of which there are 20 in the world.

[–] turtlesareneat@discuss.online 2 points 1 month ago

Floating bridges. especially the big one over Lake Washington, just don't feel... super fucking safe. I get that they are, with constant maintenance. But seeing a wave generated by your car driving is not confidence inspiring.

[–] NigelFrobisher@aussie.zone 3 points 1 month ago

Just needs tamping down.