"Paul Scott" wrote in message
...

wrote in message
...
"Paul Scott" wrote in message
...


Yes - as discussed here in the past, the District renewals towards
Upminster
appear to use identical rail and sleepers to recent NR track renewals -
the
same 'mainline' firms are involved albeit in a Metronet led consortium.
Eventually the whole SSR is supposed to get the same treatment...

What will the sleepers be made of?

Concrete - obviously the fittings for the fourth rail are additional, but
the same rail securing, with pandrol clips, as on the big railway...

I'm no concrete expert but, AIUI, water gets into concrete. This causes the
sleeper to crack and disintegrate. Plastics also don't work out, I
understand, because polymers can start to crack, which could negatively
impact the roadbed.

Are they also planning to upgrade signalling system on the Metropolitan
line?

wrote on 08 April 2009 19:40:50 ...
"Paul Scott" wrote in message
...
wrote in message
...
"Paul Scott" wrote in message
...

Yes - as discussed here in the past, the District renewals towards
Upminster appear to use identical rail and sleepers to recent NR
track renewals - the same 'mainline' firms are involved albeit in a
Metronet led consortium.
Eventually the whole SSR is supposed to get the same treatment...

What will the sleepers be made of?

Concrete - obviously the fittings for the fourth rail are additional, but
the same rail securing, with pandrol clips, as on the big railway...

I'm no concrete expert but, AIUI, water gets into concrete. This causes the
sleeper to crack and disintegrate.

Really? Perhaps you should inform railway companies throughout the
world about that, given that concrete is by far the most common material
for new sleepers. Don't you ever look at the track?
--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

"Richard J." wrote in message
m...
wrote on 08 April 2009 19:40:50 ...
"Paul Scott" wrote in message
...
wrote in message
...
"Paul Scott" wrote in message
...

Yes - as discussed here in the past, the District renewals towards
Upminster appear to use identical rail and sleepers to recent NR track
renewals - the same 'mainline' firms are involved albeit in a
Metronet led consortium.
Eventually the whole SSR is supposed to get the same treatment...

What will the sleepers be made of?

Concrete - obviously the fittings for the fourth rail are additional,
but the same rail securing, with pandrol clips, as on the big railway...

I'm no concrete expert but, AIUI, water gets into concrete. This causes
the sleeper to crack and disintegrate.

Really? Perhaps you should inform railway companies throughout the world
about that, given that concrete is by far the most common material for new
sleepers. Don't you ever look at the track?
--
Concrete does allow for higher speeds.

wrote in message


Are they also planning to upgrade signalling system on the
Metropolitan line?

Long story... Metronet was planning to, but the contract was cancelled
after it went bust. It's still likely to happen, but a few more years
into the future, and using a different system (thank goodness!). TfL
isn't exactly flush with investment funds thse days.

Paul Scott wrote:
wrote in message
...
What is it that they are actually doing? It seems almost to be every
weekend.

Rebuilding the 'sub surface railway' track and formation to mainline
standards throughout, so that the S stock will ride properly when
delivered.

I've seen precious little evidence of that yet. There has been significant
slaughtering of the trees on the embankments, though, north of
Rickmansworth - some pretty big ones at that.

"Jack Taylor" wrote in message
...
Paul Scott wrote:
wrote in message
...
What is it that they are actually doing? It seems almost to be every
weekend.

Rebuilding the 'sub surface railway' track and formation to mainline
standards throughout, so that the S stock will ride properly when
delivered.

I've seen precious little evidence of that yet. There has been significant
slaughtering of the trees on the embankments, though, north of
Rickmansworth - some pretty big ones at that.


Why are they chopping down the trees?

On Wed, 8 Apr 2009 11:35:07 +0100, "Paul Scott"
wrote:

Rebuilding the 'sub surface railway' track and formation to mainline
standards throughout, so that the S stock will ride properly when delivered.

Genuinely? About bloody time if they are.

Talking of such, I note that there is new continuously welded bullhead
rail in Euston Square station - never seen that before!

Neil

--
Neil Williams
Put my first name before the at to reply.

wrote:
"Jack Taylor" wrote in message
...

I've seen precious little evidence of that yet. There has been
significant slaughtering of the trees on the embankments, though,
north of Rickmansworth - some pretty big ones at that.

Why are they chopping down the trees?

The usual issue. Like NR, they've done so little embankment and surrounds
maintenance for over forty years that there are some very big deciduous
trees dropping their juicy leaves on the track in the autumn! So everything
on the embankment, within the boundary fence, is going. In some places,
encroaching vegetation on adjacent properties is being cut back as well.

wrote:
In article , ()
wrote:

What will the sleepers be made of?

Concrete, surely?

Did Jarrah wood go out of fashion?

Jack Taylor wrote:
Paul Scott wrote:

Rebuilding the 'sub surface railway' track and formation to mainline
standards throughout, so that the S stock will ride properly when
delivered.

I've seen precious little evidence of that yet. There has been
significant slaughtering of the trees on the embankments, though,
north of Rickmansworth - some pretty big ones at that.

Now we know what the S stands for...