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yeah, um.. that happens when SSBNs (missile subs) transit in and out of their base in Bangor, WA (my previous unit did the escorts), they close the Hood Canal Bridge (since they have to open it).. that causes SO much hate and discontent that I can't imagine a more major bridge (like the one in Baltimore) closing and the chaos that would cause..
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I live north of Baltimore and was driving south today to Bethesda. There are three ways to go across Baltimore harbor. One way is the Ft. McHenry tunnel on I-95. Another is the old Harbor Tunnel on I-895 (that is the way I go). The third way is over the Francis Scott Key bridge that was struck by the container ship. Traffic going south today was bad, but not as bad as I expected. It will probably be bad for a long time.
I heard on the news that the ship was slow moving and, because it was so slow, they were able to notify the authorities so that they could stop cars from going over the bridge to avoid the accident. But there were construction workers on the bridge who fell into the water. |
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https://www.nbcnews.com/news/us-news...ing-rcna145134
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Ya, government doesn’t cut corners
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please don't take anything I say personally, I am an idiot. |
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I agree that if its not part of AASHTO bridge design manual or not required by an outside regulator for CEII/CUI (which this bridge probably isn't, although it may make sense to include it now?) then it won't be mandated. And it still probably won't because 1) unfunded mandates aren't particularly popular (and we can already not keep thousands of bridges structurally competent without a boat ramming into it) and 2) in a risk framework this is way less than it just being deficient due to age or seismic risk (remember that EQ in 2011 that this bridge wasn't designed for?) It's the talk of the office in my design group full of a bunch of Civils on how this will play out. None of us are sure. But we hope that the whatever lessons and information we learn from this is worth the 6 lives it cost (as of 20:36 PST) Last edited by Mr.Appa; 03-26-2024 at 09:42 PM. Reason: edited to be more "civil" :) |
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Not to be pedantic, but that was kinetic energy, not potential (although those containers are stacked pretty high up there).
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Lots of whizzing in the wind on this thread.
I was an Officer of the Deck on a Nimitz Class carrier during OIF and OEF. We were doing combat ops, so the 1100-foot ship routinely weighed 104,000 tons with a full weapons and aviation fuel load. There are minimum speeds for steerage, usually around five knots. Below that speed, the rudder is not effective. There are no brakes, only astern propulsion, which further takes the rudders out of play. I drove the ship into Souda Bay, Crete, Koper, Slovenia, and anchored off Cartagena (the original one in Spain. I also drove in and out of Norfolk several times. In my submarine days, once I was selected for commissioning, the Captain would let me connect the sub on the surface, including the Hood Canal Bridge, a few times, as mentioned by Fly. It appears from the video and reports that the ship lost power and went dead in the water, which means they had no propulsion, steering, or instrumentation. The radios would have batteries which is why they could broadcast a mayday. Dropping the anchor is an action in narrow channels to avoid a collision or groundings. The ship still have forward way and no means to steer. I doubt the approach to the bridge is a straight line and there might have been tides or winds in play. A container ship is a big sail and at slow speeds, can get pushed around. In the Mediterranean, we backed down and stopped the carrier to recover a man overboard. I turned the ship to create a lee to launch a RHIB (rigid hull inflatable boat) to recover the guy about a mile away. By the time the RHIB reached the guy, we were only about 500 yards away due to the wind pushing the 104K ton carrier sideways. There is a lot of Monday morning quarterbacking going around, but the NTSB, Coast Guard, and other organizations will investigate the incident which will likely come down a root cause for the loss of power. It could be human error, material failure, sucking a bunch of crap into the seawater system, or lack of supervision. No one here is an expert on modern container ships. I know they have small crews and quite a bit of automation, but not when transiting in and out of port, everyone is on the job. |
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I spent most of my career building bridges and roads not designing them. However, I am sure a that for the new bridge will either have a fender system designed and built to prevent this or the new bridge will not have its piers placed in a such a vulnerable position. For existing bridges in this environment this will become a hot topic for retrofit much like the Schoharie bridge collapse caused bridges to be evaluated for scour risk. |
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.https://www.npr.org/2024/03/27/12411...%20that%20year.
https://www.npr.org/2024/03/27/12411...%20that%20year. Quote:
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There is a big traffic jam of ships outside the harbor while they figure out where else to go. Not all that many ships that can't leave, but that must be a pretty helpless feeling right now.
This guy must have had his channel really take off: https://youtu.be/N39w6aQFKSQ?si=Fpu1EydakCJQNF3f |
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It was such a terrifying event, straight from a disaster movie. And it confirms my anxiety every time I drive over the Bay Bridge.
Only silver lining is that this happened middle of the night and the ship was able to alert the authority to stop the traffic prior to the collision. I feel so bad for the working crew. They need add some kind of alert system on the bridge so they blast siren/text to notify people that are on that imminent danger would happen, just to give them a chance (just thinking out loud.)
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