I am working on an O Gauge layout and would like to "plan" ahead for some Postwar accessories, both operating (milk car, log loader, coal loaders, etc.) and others (floodlights, searchlight, gateman, station platforms, etc.). For example, I found that the #97 Coal Loader requires two sets of track 14" apart but no other dimensions. Another example, I found a note that the #342 & 345 Culvert Loader/Unloader requires 10" x 24.5" but don't know how much is on each side of the track. I have some of these but not all that I would like to end up with eventually.
Where can I find a list of footprint dimensions so I can leave appropriate space for these accessories ? Suggestions of how to find this information will be appreciated.