I just posted the following to the STMFC group..
Researching the wood needed to re-deck a 40’ flat car at TVRM, I located this drawing (Southern SF-4174) in the SRHA digital files. As it shows MCB dimensions, the drawing would apply to many railroads. Note how many types of Southern cars are shown.
Note the “V” groove in the 6” siding stock, purely ornamental?
PS The joint SRHA-L&NHS-RPM meet will be at TVRM Sept 30/Oct 1st in the new Exhibit building. The model railroad layout in the Headquarters building and the SRHA and L&NHS archives will be open at various times Thursday-Sunday. Info as it is available on the SRHA, TVRM and L&NHS web sites.