I wanted a cover to go over part of a goods shed platform but couldn't find a kit with the right size and height.

I 3D printed a simple design to stand on the goods platform and then thought it would be easy to tweak the design to get a two track goods shed for C-track standing at ground level. All up cost 3 - 4 Euro.

If someone wants to copy or improve the design the models can be found on TinkerCAD under my user name, revmox.

There are two sets of legs available - short = about 45mm for on platforms, long = about 65mm for on the ground. The legs are super glued on - I've had no trouble with name brand super glues but the stuff from reject or junk shops is very hit and miss.

The double track version is deliberately just wide enough to allow rolling stock to pass and just high enough for non-catenary models. I've worked in sheds like this - not enough room to start with and then any cross-brace is always in exactly the most inconvenient location.

Ender 3, PLA+ 60/200, set the "shell top/bottom line direction" to 90 degrees. (Why the default is 45 degrees beats me - it looks bad on almost everything).