Pedestrian Bridge Failure in Mexico 1

[JoelTXCive]

It looks like the bridge deck and railing are two separate elements.

They are not even at that high of a pedestrian load.

https://twitter.com/DavidWolf777/status/1534241116349878272?s=20&t=6gGnSSSdtQ8uRGXg0qUcBw

 

[JohnRBaker]

If you watch the video, the guy dressed in black on the right side of the walkway, and who was left hanging on the railing, he was jumping up and down just before the deck fell.

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

 

[hokie66]

Chain suspension bridge. Looks like a DIY job. Wonder how they connected the deck to the chains.

 

[JohnRBaker]

I don't think they were connected. Looking at both the before and after views, it looks like the deck had it's own set of cables underneath the walkway, which separated from the end of what looks like a concrete bridge/walkway.

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

 

[JoelTXCive]

I don't even think they were at 50psf...

 

[dik]

Noticed that... I'm happy that no one appears to have been seriously injured.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[dik]

Thanks for the post Joel... it puts live loading into perspective.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Do you feel any better?

-Dik

 

[hokie66]

I stand corrected. The remaining chains were just a makeshift railing. Still think it was a DIY job, probably by someone who didn't even know the meaning of live loading. 'It's the connections, stupid.'

 

[spsalso]

Seems to me, if you aren't all that familiar with "live load" and such, you would overbuild.

You shoulda seen the overbuilding by myself when I designed and built a 3' square platform that I was going to stand on, several floors above concrete. 3/8" bolts were barely good enough!


spsalso