Double Decker Bridge

[Anonymous]

I was looking at a site that was talking about bridges and tressel bridges and they said combining trestle bridges with other bridges was quite common and they showed this picture.


This picture is also at the address http://www.blackbearcc.com/why_use_jigs.htm
its the very bottom one.

What if you could make that into a double decker bridge one going through warren truss and one over it. It might not be very prototypical but it would look really cool.

Have any of you attempted something of this sort?
Is this a cool idea or just a stupid one.
What are your guys' thoughts on it?

[GMTRacing]

Metallica,
I can't find any reference to double decker railroad bridges probably because it is less expensive to build double wide and less likely to be a disaster should your milk tanker split over a car full of rice krispies. Of course the George Washington Bridge in NYC is double decked, but no trains. If you really must, go ahead, but expect the prototype people to be upset if you can't find one in real life. J.R.

[ndbprr]

There is one either over the Maumee river near Toledo Ohio or the Youghagheney river outside Pittsburgh. My memory fails me but basically one track dropped down and went thourgh the bottom of the bridge while the upper stayed level. The bridge was a box girder construction and probably 1/4 mile long or longer. There are many with trains on one level and cars on the other. I think the Ben Franklin suspension bridge in Philadelphia has the els on the bottom. My favorite is the MacArthur bridge in St. Louis where the the trains and cars share the same level and not at the same time. You can follow the end of a train across the bridge as close as you dare. There is a really neat one in Nova Scotia that goes from the lower island to Cape Breton over the Canso cuaseway. At the bridge they stop traffic to let the train use it as there is insufficient room for both at the same time.

[Anonymous]

ok thanks guys

[cefinkjr]

ndbprr:

I grew up in that area and don't remember any two-level bridge over the Yough. There is one over the Monongahela however with P&WV (now NS) on the top deck and --- back in the Forties --- Monessen Southwestern on the lower deck. I have a bunch of pix my niece took of that bridge if anyone is interested in them.

Chuck

[ericboone]

The Copper Range and Mineral Range railroads in Houghton, Michigan (in the upper penisula) shared a double deck lift bridge with a highway. The railroad used the lower deck and the highway was on the upper deck. Although the railroad is abandoned, so the bridge is kept in a higher position were the roadway uses the lower deck. This allows smaller boats to get under the bridge without it being raised.

[DSchmitt]

The "I" Street Bridge, Sacramento, CA has double track railroad on the lower level and a 2-lane public road on the upper level

http://www.sacramentohistory.org/search.php?imageid=47

[ahuffman]

The main NS (former PRR) bridge out of the station in Pittsburgh heading west across the Allegheny River is a massive double deck bridge (although the tracks are gone from the lower deck now). See the following link: http://www.pghbridges.com/pittsburghE/0585-4477/ft_wayne_br.htm
The is a bridge in Foxburg, Pennsylvania that had railroad track on top and a road through the truss on the bottom. The track is long gone, but the road is still in use.

[Anonymous]

thanks for the input guys. IF i decide to do it it will be aa double decker wooden trestle bridge. Not sure if i could do it. Id like to try it just to see if I could do it.