Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Baltimore's Key Bridge struck by cargo ship, collapses

wbaltv.com

Post reply on HN
Print view View original

61–70 of 1001 posts

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#61

Post by boshaus »

defrost wrote: post #30
questinthrow wrote: post #29

Earlier quoted context omitted.

The captain was disabled or the bridge? I dont understand how you set a course through a bridge like that

A course is set through the middle, side thrusters, rudders, and|or engines fail or falter, and current drifts the ship into the bridge pylon. Ships in water tend to move and keep moving, engines and thrusters work to vector that motion into a desired direction - when things fail motion doesn't cease and courses aren't maintained.

https://imgur.com/a/OXDh1mM

Here’s an image of its path

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#62

Post by fransje26 »

ReptileMan wrote: post #58
defrost wrote: post #30

Earlier quoted context omitted.

A course is set through the middle, side thrusters, rudders, and|or engines fail or falter, and current drifts the ship into the bridge pylon. Ships in water tend to move and keep moving, engines and thrusters work to vector that motion into a desired direction - when things fail motion doesn't cease and courses aren't maintained.

The best quote from Mass Effect: Sir Isaac Newton is the deadliest son-of-a-bitch in space!

Gravity is a harsh mistress..

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#63

Post by Symbiote »

mkl wrote: post #47
somat wrote: post #40

Earlier quoted context omitted.

What impressed me was that it looks like openstreetmap shows the bridge as down already. https://www.openstreetmap.org/#map=16/39.2144/-76.5279

Looks up there to me [1]. If you're referring to the red colour, zoom out - all the big highways are that colour. [1] https://imgur.com/LymzwMU

Tiles are cached on many servers worldwide.

The API shows the data was modified to mark the bridge as collapsed.

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#64

Post by mkl »

somat wrote: post #56
mkl wrote: post #47

Earlier quoted context omitted.

Looks up there to me [1]. If you're referring to the red colour, zoom out - all the big highways are that colour. [1] https://imgur.com/LymzwMU

cdn cache probably, It looked like this to me. https://nl1.outband.net/image/fsk_bridge_down.jpg

Yes, probably tile cache on different servers. I tried from some random TOR exit node and got a mixture of tiles showing parts of the "before" and parts of the "after": https://imgur.com/zLAdmUc

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#65

Post by [deleted] »

mkl wrote: post #47
somat wrote: post #40

Earlier quoted context omitted.

What impressed me was that it looks like openstreetmap shows the bridge as down already. https://www.openstreetmap.org/#map=16/39.2144/-76.5279

Looks up there to me [1]. If you're referring to the red colour, zoom out - all the big highways are that colour. [1] https://imgur.com/LymzwMU

[deleted]

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#66

Post by TaylorAlexander »

Somehow I find it surprising how completely the bridge collapsed after the damage. I understand that a container ship collision is serious, but you could imagine a scenarios where the bridge slumps or buckles but doesn’t just disintegrate like that. It’s surprising that ships capable of doing this damage were probably regularly driving past it, and its safety as a thoroughfare depended entirely on those collisions not happening.

Does anyone know if modern construction standards would require more stability after a ship collision, or is this still how we build bridges?

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#68

Post by giraffe_lady »

laverya wrote: post #57
lukan wrote: post #43

Earlier quoted context omitted.

I would want to first investigate how it happened and take care of the victims and their families. Then I would start planning the shiny new thing.

These two things can happen in parallel, unless we need to change how we design bridges to account for being rammed by neopanamax ships.

We might want to consider it yeah.

Re: Baltimore's Key Bridge struck by cargo ship, collapses

#70

Post by makach »

TaylorAlexander wrote: post #66

Somehow I find it surprising how completely the bridge collapsed after the damage. I understand that a container ship collision is serious, but you could imagine a scenarios where the bridge slumps or buckles but doesn’t just disintegrate like that. It’s surprising that ships capable of doing this damage were probably regularly driving past it, and its safety as a thoroughfare depended entirely on those collisions no…

Modern bridges are required to endure a collision. This bridge might be very old and not sufficiently maintained against current requirements.
Post reply on HN