Its what happens when you don't use reinforced glass and opt for the cheaper normal glass.
Can't wait to see how the high speed rails in Indonesia and SoCal work out.
More like there are multiple layers of glass. The top layer is not the structural layer and is designed to allow for cracking.
Look it up, this has happened in every single place that has this type of garbage - off the top of my head - Sydney Centre Point Tower, Chicago (forget building name) and now this.
Look it up, ignore the sensationalist Rupert Murdoch moron news sites.
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More like there are multiple layers of glass. The top layer is not the structural layer and is designed to allow for cracking.
Look it up, this has happened in every single place that has this type of garbage - off the top of my head - Sydney Centre Point Tower, Chicago (forget building name) and now this.
Look it up, ignore the sensationalist Rupert Murdoch moron news sites.
I saw it on Yahoo so I thought it was true!
I am not surprised - all of these contracts going to lowest bidder.
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The Hyatt walkway collapsed because of poor design, poor construction and most important poor planning. It was designed for a few people to walk over at a time. They didn't know that the Hyatt would hold senior citizen Tea Dances where large groups of people would be on the walkways swaying to the music.
Just like armies don't have soldiers march over a bridge. It creates too much vibration. They are ordered to stroll over.
The Hyatt walkway collapsed because of poor design, poor construction and most important poor planning. It was designed for a few people to walk over at a time. They didn't know that the Hyatt would hold senior citizen Tea Dances where large groups of people would be on the walkways swaying to the music.
Just like armies don't have soldiers march over a bridge. It creates too much vibration. They are ordered to stroll over.
According to the Wikipedia page, even the original design of the walkway was not up to code... but what was built was even weaker., barely able to support itself with zero pedestrian load. This wasn't just a case of excessive loading or lockstep causing resonance, it was flawed from the start.
According to the Wikipedia page, even the original design of the walkway was not up to code... but what was built was even weaker., barely able to support itself with zero pedestrian load. This wasn't just a case of excessive loading or lockstep causing resonance, it was flawed from the start.
Actually, that's not true either. It collapsed because the contractor building it wanted to change the bolted connections from shear to tension. This was marked up on the shop drawings and the engineers overlooked the importance of the connection and approved the changes.
What this did was make each one of those connections approximately 1/20th or so of the capacity and it failed as a result.
Picture a horizontal bolt 3/4" thick and pull down on one end and up on the other (shear force). Very large load to make it fail like that.
Turn bolt vertical and hang a truck from the nut. The threads will simply strip and fail the connection.
That's what happened at hyatt. The walkway was being supported by the threads of a bolt.
More like there are multiple layers of glass. The top layer is not the structural layer and is designed to allow for cracking.
This.
Top layer of glass is called the sacrificial layer and isn't structural. It is there to protect the structural layers of glass from being scratched by being walked on or cracked by something being dropped. If damaged it's an easy replacement to be back to good as new.
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