Duryea underframe usage


I've been under the impression that the Duryea underframe was an early
form of what became known as a "cushion" underframe in the 60's. So I
can certainly understand its application to boxcars. And I suppose
some flatcar and gondola loads would benefit from a cushion underframe.

But I see that Duryea underframes were even applied to hoppers. Why?

Walt Lankenau

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