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Designed in
1960 by the N&W as the H-11 class which is an enlarged PRR H-39
70 ton hopper. In 1964, the size was increased to 12' 3" high,
cubic feet increased to 3433 and weight capacity increased to 90-100
tons. Over
130,000 have been built.
Three distinctive
characteristics highlight this class of hopper: roping eye with
integral end buffers; end slope sheets are at a steeper angle than
the hopper sheets; 13 riveted side posts with the middle two panels
wider than the rest.
Other features
include; Wine door locks and full height side ladder stiles. Pullman,
Greenville Steel Car, and Trinity built similar cars.
The cars were
built by PRR, B&O, C&O, N&W and RDG. Bethlehem Steel
and ACF supplied prefabricated kits to other railroads.
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