Sorry, mixing my car weight limits... On Mon, May 25, 2009 at 12:36 PM, Adam Maas <[email protected]> wrote: > On Mon, May 25, 2009 at 1:32 PM, Bob Sullivan <[email protected]> wrote: >> PJ, >> >> As others have noted, there are roads and there are dirt tracks and ox >> cart paths. >> >> Compared to an ox cart path, a railroad right of way is expensive. It >> takes 2 steel rails, cross ties set in a gravel roadbed, ditching and >> a subsoil to support the roadbed and carry the weight. Modern paved >> roads are even more expensive. They require a wider right of way, the >> same or better subsoil and ditching preparation, then several layers >> of materials to distribute the weight back down to the ground, >> finishing with several inches of concrete. (The US has heavier trucks >> than Europe and can require 10 inches of concrete.) >> >> But it all comes down to cost per ton of traffic handled. A dirt path >> is fine for 5-10 horses a day but would never do for the 10 million >> tons of coal that pass me on the railroad track on a daily coal train >> (100 cars at 100,000+ tons each). Imagine trying to get 10 million >> tons of coal into Chicago on a dirt path in the rain. >> >> Regards, Bob S. > > Bob, > > Try about 100,000-150,000 tons of coal per train. 100-150 cars at 100 > tons each, not 100,000 tons each. > > -- > M. Adam Maas > http://www.mawz.ca > Explorations of the City Around Us. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. >
-- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
