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03-16-2018, 09:08 AM | #23 |
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few beams or columns in the center would've probably avoided from collapsing.
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03-16-2018, 09:23 AM | #24 |
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03-16-2018, 09:43 AM | #25 |
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03-16-2018, 09:50 AM | #26 | |
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https://www.yahoo.com/gma/florida-br...opstories.html |
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03-16-2018, 10:24 AM | #27 | |||
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The bridge and those cables was going through tweaking (stress testing) and the cable on the crane providing support (to take support off the bridge while this was going on) snapped. It was a failure of the crane’s cable, not the bridge. |
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03-16-2018, 10:33 AM | #28 |
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Been in construction management for 20 years. The low bidder isn't always the one you want. Reputation, previous job experience (especially bridge construction), and painlessness associated with management is who you want. This was a horrible accident but could have been prevented.
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03-16-2018, 10:33 AM | #29 |
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03-16-2018, 10:43 AM | #30 | |
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Other then the crane cable, where are the bridges cables? I thought this was a simple concrete girder bridge how are the cables attached? |
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03-16-2018, 10:47 AM | #31 | |
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Also note the braces connecting top and bottom to distribute weight at those points. Remember, students crossing do not need to have a 40+ ton weight load such as a vehicle bridge. Last edited by IK6SPEED; 03-16-2018 at 11:25 AM.. |
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03-16-2018, 10:59 AM | #32 |
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I read it as stated which is that he was not sure a bridge was necessary. He did not mention acceptable loss of life.
If we are motivated enough and pedantic enough, we could impeach any post in any thread in this forum on the basis of implied consequence. For example, we could turn any discussion into an argument about whether all of us, as automotive enthusiasts, think that it is ok to speed despite the higher risk to other motorists associated with that act or to drive vehicles which expel higher levels of tailpipe emissions than is necessary for human transport. But we are not going to do that because there are rules about diverting discussions off the topic of the thread. But its not just that. We are also not going to do that because we are adults and we are going to work together to make BimmerPost a friendly place. We are not going to exhibit deliberate hostility toward others simply because we may not agree with them on everything. Since we all understand each other, I know that this particular thread will henceforth be limited to the topic of the bridge collapse and tragedy that killed at least four people. And out of respect for them, we are not going to make it into some political debate. Thank you all for enjoying BimmerPost in compliance with the rules. Have a great day. |
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03-16-2018, 11:06 AM | #33 |
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Is it common to stress test a bridge while traffic is flowing underneath it? I don't know the answer and this is nowhere near my field, but conceptually seems odd, without having a background to understand how the process works.
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03-16-2018, 11:21 AM | #34 |
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^ Additionally, I saw a student on interview complaining that you should work on a bridge AT ALL while traffic is flowing. Were that the case, there is a lot of traffic that is going to be disrupted to allow all the continuing bridge repair that must be done. Can we not have traffic on Golden Gate since they are painting and checking those cables (or any other similar suspension bridge?)
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03-16-2018, 11:25 AM | #35 | |
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03-16-2018, 11:26 AM | #36 |
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03-16-2018, 11:28 AM | #37 | |
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03-16-2018, 11:30 AM | #38 |
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The GG has maintenance done pretty much every day year round, so they would have to close it. Maybe just build another bridge, because the bay bridge went so well.
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03-16-2018, 11:32 AM | #39 | |
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If not, temporary cables would be attached to support weight while another cable is replaced. This bridge was placed in position, but had not been “installed”. Again, cable on crane is most likely culprit according to eyewitnesses on site in Cars short of intersection when collapse happened, not bridge failure. |
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03-16-2018, 11:38 AM | #40 | |
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Then again, an 18 wheeler might have taken that center support out, causing death in cars AND students above. Regardless, center column wasn’t a big deal in today’s engineering. The bridge was designed to withstand a Cat 5 Hurricane, so it wasn’t some Swinging Amazon Rope Bridge across a river. |
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03-16-2018, 11:43 AM | #42 | |
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03-16-2018, 11:45 AM | #43 | |
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Crane was moved out to provide room for rescuers according to eyewitnesses. Again, examine picture I posted right after collapse. You will note no first responders or rescue trucks. Furthermore, normal vehicles there, not fire trucks and you can see 1 car turning around to get out. |
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03-16-2018, 11:53 AM | #44 |
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Very different than this.
BTW, notice red crane in upper left they are bringing in. Why not use crane involved and on site already instead of moving it off scene? Cable broke, that’s why. Last edited by IK6SPEED; 03-16-2018 at 11:59 AM.. |
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