The Open Top Loading Rules were printed annually with very few exceptions from 1934 (when they were separated from Closed Car Rules) up until 1948. The Mechanical Division controlled the Open Top Rules from 1934 forward while Closed Car Rules were controlled by the Transportation Division. The Open Top Rules were mandatory as per the Interchange Rules.
In 1948 the Open Top Loading Rules Committee followed the requests of both shippers and the carriers and divided the full manual into the pamphlets you have in your collection, the first being issued in 1950. All six were revised thru 1959 via supplements and new editions. In 1959 all were combined into a new loose leaf publication first issued in 1960.
I can help you with any of the "Cat" diagrams if you have need.
On Oct 15, 2012, at 9:33 AM, "Gene" <firstname.lastname@example.org> wrote:
Among others, my collection includes the following loading rules booklets.
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