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Friday, March 29, 2024

Automaker Stellantis (STLA) , which manufactures top car brands such as Jeep, Chrysler and Dodge, laid off about 400 of its U.S. corporate employees late last week, and it used a sneaky new tactic to do it. read more


Friday, March 22, 2024

Private equity firm Apollo Global Management has offered $11 billion for Paramount Global's Paramount Pictures film studio, a person with knowledge of the offer said on Wednesday, adding to takeover interest in the media conglomerate. read more


Monday, March 18, 2024

On Monday during a Criminal Justice Committee meeting it was announced that rats infesting the New Orleans Police Department headquarters are getting high off of marijuana from the evidence room. The New Orleans Police Department headquarters also has a mold and cockroach problem.


Thursday, March 14, 2024

Supreme Court Justice Samuel Alito on Tuesday extended an order blocking Texas troopers and police from arresting and jailing migrants suspected of crossing the U.S. southern border without authorization under a strict state immigration law known as SB4. read more


Tuesday, March 12, 2024

On Tuesday, the Bureau of Labor Statistics reported that the Consumer Price Index climbed 3.2% in the 12-month period ending in February " missing expectations of a slightly lower 3.1% reading, and coming in higher the 3.1% seen in January.


Comments

#34 | Posted by LampLighter

I went and viewed the linked video about 20 times. And indeed. I studied this. A long time ago now... I became a Civil Engineer specialized in Structures and Construction management by degree and limited practice before I moved to IT. I will also say I didn't get to work on bridges. I worked on suspension steel and trusses in manufacturing and power generation plants. I totally get the main span and if you are watching the video the span to the left of the piling as well. Truss bridges are a lot less expensive to build and maintain so they are used all over and it makes sense in most cases. This was kind of a combination of Truss and Arc - which I didn't realize before. I suspect that is part of the cause of the far span collapse.

If that ship hit a proper suspension bridge Pier/cap/piling for the span of this bridge. It is hard to say. It all depends on how well the bridge was designed, maintained and the circumstances. Same conditions with a suspension bridge? Yes, it would likely destroy the bridge but would it collapse like this? I am skeptical - it may very well collapse but it did not collapse the support system. It certainly moved it. You would certainly have sections of the deck fail - break apart and maybe fall. That said, if this was a well done suspension bridge you also likely would have a much wider channel and not a support straddling the channel. The current center span was about a quarter mile - that is nothing for a suspension bridge. At Baltimore, in the future you would certainly design for a ship strike of this size or larger. (I haven't looked into it but I am a bit surprised it was not retrofitted with bumpers.) You may even make the span wide enough that it is not possible for a ship of any size to strike the pilings without having grounded well before. They will also likely raise the deck so even bigger ships stacked higher can make their way into port in the future.

That poor construction crew - looks like they were the only ones on the span though.

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