OT The Forth Bridge

Actually, though I get the gist of your point, the news item I heard told me
that there have been strain gauges installed on some parts of the bridge for
over a decade now, monitoring the cracks, so its not new at all. I suppose
they must have recently widened. The metalwork is now old and presumably
nobody really wanted to spend the megabucks to try to fix it and so they
hoped it would not affect structurally important areas any time soon.

Now they will have either to fix the important problems or at least do a
manual inspection to see what is to be done.
Nothing lasts for ever.
Brian

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"Bill Wright" wrote in message
...
I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

I sometimes look at a newsgroup populated mostly by Russian engineers. One
person, a senior female engineer called Slapabitta Ameritonit (you might
have heard of her because in a previous life she represented the USSR for
weight lifting in the 1964 Los Angeles Olympics) said that they should
have just slapped a bit of Hammerite on it and walked away. I think she
might be right.

Bill

On 04/12/2015 17:39, Brian-Gaff wrote:
Actually, though I get the gist of your point, the news item I heard told me
that there have been strain gauges installed on some parts of the bridge for
over a decade now, monitoring the cracks, so its not new at all. I suppose
they must have recently widened.

I thought it was the strands that were breaking in the suspension
cables, and there were transducers fitted to record when another one
snaps and goes 'ping' ?

This/these new crack/s is a different kettle of fish ?


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Mark
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Yes and its really under tremendous stresses, and the word 'new' in this
context is rather misleading, as everything is relative.
The old railway bridge has got issues too, but its built far more
conservatively and can take it.
I do often wonder about more modern bridgees and exactly how long they
might be expected to last. The old Severn Bridge has had to have significant
work done to it to keep it safe after all.
Brian

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"charles" wrote in message
...
In article ,
Bill Wright wrote:
I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

I sometimes look at a newsgroup populated mostly by Russian engineers.
One person, a senior female engineer called Slapabitta Ameritonit (you
might have heard of her because in a previous life she represented the
USSR for weight lifting in the 1964 Los Angeles Olympics) said that they
should have just slapped a bit of Hammerite on it and walked away. I
think she might be right.


it's not *The* Forth Bridge. it's the modern upstart th Forth Road
Bridge.

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On Fri, 4 Dec 2015 15:40:05 +0000, Bill Wright
wrote:

On 04/12/2015 14:47, Mark Carver wrote:
On 04/12/2015 14:37, Tim+ wrote:
Bill Wright wrote:
I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

I sometimes look at a newsgroup populated mostly by Russian engineers.
One person, a senior female engineer called Slapabitta Ameritonit (you
might have heard of her because in a previous life she represented the
USSR for weight lifting in the 1964 Los Angeles Olympics) said that they
should have just slapped a bit of Hammerite on it and walked away. I
think she might be right.

Bill


Hmm, might need a few coats of Hammerite to fill this crack.

http://www.forthroadbridge.org/news/...ntil-new-year/


Alright then, lash some cable ties round it too ?


Yeah, mebbe a bit of gaffer tape might come in useful as well...

It looks like a job for No More Nails.

--
Peter Duncanson
(in uk.tech.digital-tv)

In article ,
Brian-Gaff wrote:
I do often wonder about more modern bridgees and exactly how long they
might be expected to last. The old Severn Bridge has had to have
significant work done to it to keep it safe after all.

Very true. I went on a school trip to see the Forth Road bridge being
built. Seems odd it has had such a short life.

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Dave Plowman London SW
To e-mail, change noise into sound.

On 04/12/2015 18:16, Peter Duncanson wrote:

Hmm, might need a few coats of Hammerite to fill this crack.

http://www.forthroadbridge.org/news/...ntil-new-year/


Alright then, lash some cable ties round it too ?


Yeah, mebbe a bit of gaffer tape might come in useful as well...

It looks like a job for No More Nails.


Which reminds me, whatever happened to Marky P ?


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Mark
Please replace invalid and invalid with gmx and net to reply.

En el artículo , Bill Wright
escribió:

I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

It's not that, individual strands of cable are snapping in the main
stays (the horizontal runs that span the bridge). Because snapped
strands are hard to detect, they can't tell how many have gone.

The problem is caused by the Scottish weather - the cables are corroding
and snapping on the inside. Eventually, you're going to have the outer
(painted, protected) cable with a rotten core.

There's supposedly a proposal in place to blow low-humidity air into the
gaps in the cable to reduce the speed of corrosion but I haven't been
able to find out more. I have a feeling it's too late to save the
bridge now.

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(")_(")

Mike Tomlinson wrote:
En el artÃ*culo , Bill Wright
escribió:

I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

It's not that, individual strands of cable are snapping in the main
stays (the horizontal runs that span the bridge). Because snapped
strands are hard to detect, they can't tell how many have gone.

The problem is caused by the Scottish weather - the cables are corroding
and snapping on the inside. Eventually, you're going to have the outer
(painted, protected) cable with a rotten core.

There's supposedly a proposal in place to blow low-humidity air into the
gaps in the cable to reduce the speed of corrosion but I haven't been
able to find out more. I have a feeling it's too late to save the
bridge now.


A proposal? It's been going for years.

Tim

En el artículo , Tim+
escribió:

A proposal? It's been going for years.

Hasn't worked, has it? Seems a bit Heath Robinson to me.

--
(\_/)
(='.'=) Bunny says: Windows 10? Nein danke!
(")_(")

On 04/12/2015 13:42, Bill Wright wrote:
I think they're over reacting! Just because of a few cracks in the
metalwork they've closed the bridge.

I sometimes look at a newsgroup populated mostly by Russian engineers.
One person, a senior female engineer called Slapabitta Ameritonit (you
might have heard of her because in a previous life she represented the
USSR for weight lifting in the 1964 Los Angeles Olympics) said that they
should have just slapped a bit of Hammerite on it and walked away. I
think she might be right.

Bill

Have long thought that half the answer to this type of problem is half a
bridge.

Imagine, having built the FRB with N and S decks, a modest number of
years later you had built HALF its replacement. You than could have
three decks available - in any combination of being in use in either
direction or in maintenance.

Then you build another replacement... and are ready to let the original
get demolished (or fundamentally rebuilt in situ).

--
Rod