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RE: bay bridge

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Noble thoughts.

However, we can't even afford to maintain our steel bridges in their current
condition, let alone with fire protection systems.




David L. Fisher SE PE
Senior Director

Cape Cod Grand Cayman Holdings Ltd. - Cayman
Fisher+Partners Structural Engineers Ltd. - Cayman
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-----Original Message-----
From: Scott Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu] 
Sent: Wednesday, May 02, 2007 10:57 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: bay bridge 

If you look only at this situation, then it might be cost and time
efficient.  But, you need to look at all cases.  How many times has a fuel
tanker crashed and produced a fire that is hot enough to weaken the steel
and collapse a structure?  So, now does using fire protection on ALL steel
bridges across the country really look that cost efficient?  You have one
incident at one bridge when there are years and years of tons of steel
bridges in service.  So, yes...you might save some money in not having to
rebuild this "bridge" (and Mark, many people consider a horizontal span of
highway to be a bridge even it is NOT really the Bay Bridge) but how much
more money are you going to end up spending on bridges that don't and
never have been hit in such a situation that a fire could cause a section
of the bridge to collapse.  You willing to have your taxes increased to
put fire protection on all those bridges (hell, we cannot even just pay
for maintance of our roads and bridges here in Michigan without more money
[aka taxes]) due to one incident at one bridge over how many years?  Good
luck on that one.

It is the same reason why we don't design every building to that level
that we design hospitals for seismic events.

Regards,

Scott
Adrian, MI

On Wed, 2 May 2007, S. Gordin wrote:

> Mark,
>
> You are right, but the condition may be extrapolated...
>
> It appears that an effective overlapping system of fire suppression is
warranted on all bridges, especially, on the steel structures.  In the
current situation, it may be a worthy, relatively cost- and time-effective
investment into the infrastructure.
>
> V. Steve Gordin, SE
> Irvine CA
>
>
>
>   ----- Original Message -----
>   From: Mark Gilligan
>   To: seaint(--nospam--at)seaint.org
>   Sent: Wednesday, May 02, 2007 08:13
>   Subject: Re: bay bridge
>
>
>   The Bay Bridge is still standing.
>
>   The damage occured to some of the elevated structures
>   at the East end of the bridge where several freways
>   intersect.
>
>   Mark Gilligan
>
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