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[Johnson Street Bridge REPLACEMENT] General, technical, design and naming discussion


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#7961 LJ

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Posted 09 August 2020 - 07:25 PM

Does it come down that slow all the time?


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#7962 Nparker

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Posted 09 August 2020 - 08:48 PM

Maybe the bridge shouldn't have taken that little blue pill before it was raised.



#7963 Gary H

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Posted 09 August 2020 - 08:51 PM

^^It does.  IIRC, the requirement was 90 seconds.  As you can see from the video, it's taking about 60 seconds longer.  But wait, weren't those fancy German oil filters supposed eliminate the need to slow things down?



#7964 Mike K.

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Posted 09 August 2020 - 09:07 PM

The parrots approved!

Thanks for that, Gary. It looks great. But yeah, it moves pretty slow.

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#7965 On the Level

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Posted 07 July 2021 - 05:21 PM

Johnson Street Bridge can't get it up....

 

https://vancouverisl...ition-1.5500888



#7966 Barrrister

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Posted 07 July 2021 - 07:38 PM

I have a bad feeling about this. Hope I am wrong.



#7967 spanky123

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Posted 07 July 2021 - 07:41 PM

Focus has been pretty quiet on this for the past 12-18 months but from what I recall, the original with the bridge that we had 2 years ago was never resolved. The remedy was to raise/lower the bridge at 1/2 the speed.


Edited by spanky123, 07 July 2021 - 07:41 PM.


#7968 JohnsonStBridge

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Posted 07 July 2021 - 08:59 PM

Relax, everyone calls in sick every once in a while.


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#7969 Rob Randall

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Posted 08 July 2021 - 06:08 AM

It's expected that mechanical things break down from time to time.

 

What will be interesting to watch are the lengths the City takes to keep details of the mechanical problems off the pages of FOCUS magazine.


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“I mean I just don’t understand the big Texas part, like maybe he’s from Texas? I want to know the back story.”


#7970 Mike K.

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Posted 08 July 2021 - 07:38 AM

So in this case, did we need an architect to design the world’s most complicated lift bridge?

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#7971 sebberry

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Posted 08 July 2021 - 07:46 AM

Johnson Street Bridge can't get it up....

 

https://vancouverisl...ition-1.5500888

 

 

"UPDATE: The city said the bridge had returned to normal operations by 9 p.m. Wednesday."

 

Excellent reporting by the local media.  What was wrong?


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#7972 Sparky

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Posted 08 July 2021 - 09:31 AM

^ It didn't do the only job assigned to it. :)

 

It broke. The why it broke is going to be technical. 

 

Perhaps it was caused by a faulty limit switch on the external security retraction elevator override module.


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#7973 Matt R.

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Posted 08 July 2021 - 09:40 AM

It’s usually the thermocouple.

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#7974 sebberry

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Posted 08 July 2021 - 09:43 AM

If it was properly balanced with the counterweights you should be able to just hang a few burly guys from a pullup bar on the short end of the teeter totter and lift it up manually.  


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#7975 Rob Randall

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Posted 08 July 2021 - 09:47 AM

It’s usually the thermocouple.

 

Or the Illudium Q-36 space modulator.


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“I mean I just don’t understand the big Texas part, like maybe he’s from Texas? I want to know the back story.”


#7976 spanky123

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Posted 08 July 2021 - 10:12 AM

If it was properly balanced with the counterweights you should be able to just hang a few burly guys from a pullup bar on the short end of the teeter totter and lift it up manually.  

 

Are you sure that is not what they are doing to fix the bridge?!


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#7977 Sparky

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Posted 09 July 2021 - 04:56 AM

Ok so it wasn’t the doohickey that caused the problem…it was just the computer. No worries then.

https://www.timescol...city-1.24340252

#7978 Rob Randall

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Posted 09 July 2021 - 05:02 AM

I'm baffled as to how a "software issue" prevents a bridge from being manually opened. Is it really useless unless the computer is fully operational? There's no manual override or somesuch? Where they hit by that global ransomware shakedown?


“I mean I just don’t understand the big Texas part, like maybe he’s from Texas? I want to know the back story.”


#7979 Victoria Watcher

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Posted 09 July 2021 - 05:14 AM

I'm baffled as to how a "software issue" prevents a bridge from being manually opened. Is it really useless unless the computer is fully operational? There's no manual override or somesuch? Where they hit by that global ransomware shakedown?

 

perhaps say a sensor that records hydraulic oil pressure was not returning a result or that result was not being received or recorded.  so the software prevents the bridge opening for fear of a dangerous high or low pressure level.

 

other sensors could include ones that detect the exact position of the lift or whether the locks are in place.  maybe even weather sensors that won't allow a lift under certain wind conditions. 

 

i do not think you want to "override" these sensors and lift manually if you do not know what they are reading even if an override is possible.


Edited by Victoria Watcher, 09 July 2021 - 05:17 AM.

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#7980 Rob Randall

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Posted 09 July 2021 - 05:28 AM

^All true. But couldn't it be solved with a simple reboot? What computer doesn't return to normal after a reboot?

 

And can it be closed if the computers don't work? Because that's why we spent a few extra millions, as a post-earthquake lifeline.

 

I have no expertise.


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“I mean I just don’t understand the big Texas part, like maybe he’s from Texas? I want to know the back story.”


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