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Old 05-30-2007, 02:43 PM   #5
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Join Date: Jan 2004
Posts: 532

Railroad rules include a number of requirements for blocking certain commodities including keeping some tank cars away from open cars with shiftable loads (e.g., load of steel on a flat car).

A general rule is to keep haz mat shipments at least 5 cars away from a locomotive or occupied caboose. If the number of cars in the train does not permit this then at least one buffer car is required.
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