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corv8
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| Joined: | Tue Nov 13th, 2018 |
| Location: | Vienna, Austria |
| Posts: | 657 |
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Alwin wrote:
And why did they use ballast on the bridge?
The extra weight makes that the construction has to be extra heavy too.
There other solutions for that.
I understand that this is the way to go today.
A non ballasted bridge will cause a "dip" in the roadbed before and after the bridge,
because the ballast will settle and the steel or concrete bridge doesnt.
This may cause a high powered loco to slip its drivers momentarily,
and then cause stresses on the drive components when she grips the rails again.
Gerold
.... just noticed I commented to a very old message ....
anyway, maybe its still of interest.
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Gerold
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| Posted: Sat Aug 29th, 2020 07:01 am |
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63rd Post |
John Teall
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| Joined: | Sat Aug 1st, 2020 |
| Location: | Reno, Nevada USA |
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Bit of history on long ravine bridge(s) about a mile east of Colfax.
I grew up in Colfax,
and was living there when they built the freeway (I-80).
If you look at the other bridge and to either side of the piggy backing,
you see it's supported on these latice-work iron bents.
And while the NCNG had snaked through between them just fine,
the one on the closer bridge, was right smack in the middle of the way,
to put the freeway through under it.
So that support span,
replaced where the bent, that had been in the way, was.
Now the curve in the Opher bridge, west of Auburn.
The curve was there before the bridge so to speak,
and again, the piggy-backing, was a matter of creating a wider free span.
Auburn California is where I graduated highschool in 1966.
It was in '62 that the freeway was completed through Colfax.
Before that US-40 had been the main highway.
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themnax
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| Posted: Sun Sep 26th, 2021 01:34 am |
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64th Post |
| Posted: Sun Sep 26th, 2021 08:11 am |
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65th Post |
corv8
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| Location: | Vienna, Austria |
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Ahhh´.... love this.
Reminds me of farmers in the USA,
using surplus flatcars as bridges over their creeks...
Or certain cash strapped RRS burying old cars
(both automobiles and RR cars)
along riverbanks to slow erosion...
This all needs to be modeled.
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Gerold
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Ken C
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Bridge #21 located at Payne Bluff on the Kaslo & Slocan Railway in British Columbia,
a 3 foot gauge line serving the mines and mills in the Slocan mining district.
The trestle was 200 feet in length, the second trestle #22 was 50 feet in length,
this allowed a level line from the summit, to the end of the line at Sandon BC.
In 1897 the running rails on both trestles were moved toward the outside, to allow for
clearance for their Rotary Snow Plow (ex RGS #1) and their OF 2-8-0 #3 (ex DM&KC #9).
The drop off was roughly 750 to 800 feet to the valley floor.
Attachment: K&S Bridge # 21.JPG (Downloaded 40 times)
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Ken Clark
GWN
Kaslo & Slocan Railway
International Navigation & Trading Co
Kootenay Railway & Navigation Co.
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| Posted: Sun May 15th, 2022 09:43 pm |
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67th Post |
| Posted: Mon May 16th, 2022 03:32 pm |
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68th Post |
pipopak
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| Joined: | Wed Apr 13th, 2011 |
| Location: | Florida USA |
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 sez:
No matter how bad you screw up your scenery
there is a prototype for it somewhere.
Jose.
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Junk is something you throw away three weeks before you need it.
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