grades on bridges

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.

 

 

Jurgen Kleylein's picture

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

Visit the HO Sudbury Division at www.wrmrc.ca

The preceding message may not conform to NMRA recommended practices.

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

cv_acr's picture

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.

you betcha

I whole heartedly agree with Chris.

Terry

Mike Maisonneuve's picture

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/


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