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grades on bridges
Sun, 2012-07-01 11:47 — Peter Pfotenhauer
When running over tall steel trestles and other larger bridges, how often were such tracks on the level vs on grade, especially in situations where the railroad was climbing a grade in the surrounding territory.
Are there any operational implications for our models (I am in N Scale) of having the track on grade? I have a spot where I plan to have a 4 foot steel trestle in a layout plan, and really need the 1 inch height gain I could get by keeping the track on its 2% grade over that length.
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It's been discussed before
http://model-railroad-hobbyist.com/node/5897
http://model-railroad-hobbyist.com/node/6470
Jurgen
HO Deutsche Bundesbahn circa 1970
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Bridges on grades
I've seen quite a number of them on the various prototypes I have visited. I did not see any that changed grade just for the bridge.
I have a copy of the 1983 UP track profile for the northwest. Between Granger and Pocatello I noted only one bridge on a 0.0 grade. There were at least 100 bridges of various length up to 350 feet shown.
I have constructed model bridges and trestles and combinations of the two for use on grades. The pilings and supports are vertical with the tops modified for the grade.
Terry
Grades
I think this is covered in the other threads, but it's more important that the grade be consistent, not level, across the bridge.
Chris van der Heide
CPR Sudbury Division (Waterloo Region Model Railway Club)
Canadian Freight Car Gallery
you betcha
I whole heartedly agree with Chris.
Terry
An Example
The Heart River Bridge at Peace River Alberta, Canada on the Northern Alberta Railways.
Prototype = about 2% grade
My model will be 3.5% (Crazy... I know but I like helper grades).
I haven`t run a train over it yet but it works in all my trials (fingers crossed).
Mike Maisonneuve
Modeling Northern Alberta Railways' Peace River Subdivision in N Scale
http://nscalenar.blogspot.com/