Hi,
I was scanning an ORER from 1905 and found 12 pages of very interesting reading about loading open cars.
It explains how to chain cars together. It explains when and where loads can hang over the ends of open cars (flats and gons).
It includes steel, logs, structural shapes, lumber, and a bunch of other items (like tanning bark).
These 12 pages even converted to PDF and zipped up take almost 8Meg. I think most modelers might be interested.
If anyone would like a copy of there pages, please let me know back channel.
Doug vV