Some Narrow gauge railroads, (EBT and D&RGW comes to mind) operated with dual gauge trackage at some locations. Sometimes they would park the NG cars and SG cars side by side and transfer loads by hand. Sometimes they simply lifted the SG car off of it’s trucks and placed it on NG trucks and continued to the destination. The Colorado Midland Railway exchanged with the D&RGW.
So out came my Colorado Midland books for research. I chose an early 1900’s 40’ box car. All the plans and dimensions were in the book.
A custom frame and parts from Phil Dippel and I went to work. Decals by Stan, of course. Right now my model is riding on Andrews NG trucks. I have some feelers out for a set of SG trucks from Iron Horse Shops.
The car right out of the shop.
A 1:20.3 D&RGW NG 30’ box car behind it.
A 1:20.3 40’ NG reefer.
Another 40’ comparison view.
The width is only 1/2" wider on both sides. The height scales out to about 1" higher.
It fits thru my truss bridge. Whew!