Re: Army tanks on flats
This link will take you to the Handbook of Transportation by Rail and Commercial Vessels. It's WWI vintage. A 129 page .pdf file, the first 35 or so pages are all about the paperwork used to request transportation and contract with the carrier. Then it gets into car descriptions, how to compute how many cars you need etc.
I tried to upload it to the files section, but it doesn't seem to be working for me tonight. Hope this helps someone.