Use of 40 ft Boxcars through time

[jglfan]

I had read long ago but can not recall the source, that many older receiving docks had their doors spaced for 40' boxcars, and therefore those companies insisted that 40' cars be delivered. As I recall, the point of the article was the demand for the 40'ers caused the railroads to keep them around longer than they would have otherwise, and that they needed to have them available for certain customers.

Gary