Fixing a railway line in Alaska....

They had a worn section to replace so measured up the length they had
on the truck, with which to replace it - around 14 feet. Chalk marked
the damaged piece to cut it out, from an existing join and replace it
with the new 14 foot section. All joined by fish-plates.

The new piece was an inch short, which they blamed on the line being
under tension before they cut it. To expand it, they laid some sort of
combustible rope along the existing bit of line (maybe 30 feet) and it
showed the gap between new and old closing up.

1. Why would it be under such tension, as to be able to shrink by 1"?
2. Would a 30" line section really expand by 1" with so little heat?
3. Surely once it cooled down anyway, the 1" gap would return anyway.
the fish plates are there to allowing for the expansion and
contraction.

replying to Harry Bloomfield, Iggy wrote:
I don't buy it either. TOTAL HACK WORK by hacks trying to justify their
stupidity! It's quite ridiculous that they wouldn't know about such a
GUARANTEED situation of ground movement for one and for another thing that the
gap would've been APPARENT at the prior fish plates? It's common sense and
common practice to remove the old joint's fish plates before cutting anything.

Even with their "astonishing discovery" FRAUD, they'd cut the fish plate end
off and burn-in new fish plate holes. One might even do a 2nd set of fish
plates and reuse a good piece of the moronically cut out section to get rid of
any gap. And no, there's no "combustible rope" that lets you stretch heavy
steel BY HAND or WISHFUL THINKING. Just stupid lies reported by an imbecile
and fellow hack "journalist".

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On 15/10/17 15:44, Iggy wrote:
replying to Harry Bloomfield, Iggy wrote:
I don't buy it either. TOTAL HACK WORK by hacks trying to justify their
stupidity! It's quite ridiculous that they wouldn't know about such a
GUARANTEED situation of ground movement for one and for another thing
that the
gap would've been APPARENT at the prior fish plates? It's common sense and
common practice to remove the old joint's fish plates before cutting
anything.

Even with their "astonishing discovery" FRAUD, they'd cut the fish plate
end
off and burn-in new fish plate holes. One might even do a 2nd set of fish
plates and reuse a good piece of the moronically cut out section to get
rid of
any gap. And no, there's no "combustible rope" that lets you stretch heavy
steel BY HAND or WISHFUL THINKING. Just stupid lies reported by an imbecile
and fellow hack "journalist".


Cripes . This arrived before what it was replying to.

Anyway, having found te origianl and checking it wasnt posted in the
stone age, harry, its normal for rails to be under either tension or
compression, amd modern rails are long welded and then stuck down to
heavy concrete sleepers to stop them buckling.

Normally with fishplates you are talking about non long welded rails
with expansion gaps, but there is always a point where long welded meets
old stuff.

one inch in 30 feet ios 3% give or take

steel has a coefficient of expansion of around 12 ppm per degree C

Which would mean a temperature difference of 250C to create an inch of
expansion.

in a 30ft rail. But I have never heard of a 30 ft rail

railsare generaly at least twice that length



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Gun Control: The law that ensures that only criminals have guns.

On Sun, 15 Oct 2017 12:54:38 +0100, Harry Bloomfield
wrote:

Fixing a railway line in Alaska....

They had a worn section to replace so measured up the length they had
on the truck, with which to replace it - around 14 feet. Chalk marked
the damaged piece to cut it out, from an existing join and replace it
with the new 14 foot section. All joined by fish-plates.

The new piece was an inch short, which they blamed on the line being
under tension before they cut it. To expand it, they laid some sort of
combustible rope along the existing bit of line (maybe 30 feet) and it
showed the gap between new and old closing up.

Wouldn't they notice the one-inch gap that suddently appeared when
they made the first cut?

"Harry Bloomfield" wrote in message
news
Fixing a railway line in Alaska....

They had a worn section to replace so measured up the length they had on
the truck, with which to replace it - around 14 feet. Chalk marked the
damaged piece to cut it out, from an existing join and replace it with the
new 14 foot section. All joined by fish-plates.

The new piece was an inch short, which they blamed on the line being under
tension before they cut it. To expand it, they laid some sort of
combustible rope along the existing bit of line (maybe 30 feet) and it
showed the gap between new and old closing up.

1. Why would it be under such tension, as to be able to shrink by 1"?

So it didn't buckle at the higher temperatures seen there naturally.

2. Would a 30" line section really expand by 1" with so little heat?
3. Surely once it cooled down anyway, the 1" gap would return anyway. the
fish plates are there to allowing for the expansion and contraction.

The Natural Philosopher explained :
Which would mean a temperature difference of 250C to create an inch of
expansion.

in a 30ft rail. But I have never heard of a 30 ft rail

I could only make a judgement in regards to the length. I doubt the
rail got to anything hotter than warm to the touch - the 'rope'
material simply burned with a small yellow flame laid along one side of
the rail. It was something special for that sort of purpose, they
pulled the 'rope' from a 5 gall drum.

It was the usual drama, of a train being due on the line in just twenty
minutes and just two of them working on the line repair. The line
cutting grinder was faulty, they fixed that, cut the line, then fixed
the 1" gap. There was no mention or sight of them drilling the holes
through the newly cut end of the line for the fish-plate bolts.

On 15/10/17 18:14, Harry Bloomfield wrote:
The Natural Philosopher explained :
Which would mean a temperature difference of 250C to create an inch of
expansion.

in a 30ft rail. But I have never heard of a 30 ft rail

I could only make a judgement in regards to the length. I doubt the rail
got to anything hotter than warm to the touch - the 'rope' material
simply burned with a small yellow flame laid along one side of the rail.
It was something special for that sort of purpose, they pulled the
'rope' from a 5 gall drum.

It was the usual drama, of a train being due on the line in just twenty
minutes and just two of them working on the line repair. The line
cutting grinder was faulty, they fixed that, cut the line, then fixed
the 1" gap. There was no mention or sight of them drilling the holes
through the newly cut end of the line for the fish-plate bolts.

Well MOST of this stuff is somewhat staged



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a car with the cramped public exposure of €¨an airplane.€�

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