I currently have a MTH single engine shed, it was one of those "Have to have it" moments.
Nice building, just too much for my small layout, it gets in the way more times than not.
I recall seeing photos of open air locomotives sheds, mainly on southern RRs where the climate is generally not so cold during the winter, but I can't seem to find much when I do a search on Google. I did find this photo of a model shed that may be a good starting point:
It would have to be as narrow as the MTH shed and probably as tall, at least enough room to get my steamers under the framework.
Speaking of framework, I like the idea of using wood vice steel supports, but would they have used wood around steam engines where the wood is so close to the hot exhaust?
I even recall seeing one shed that had a cutout in the roof supports for a smokestack to pass thru, but additional supports would have to be installed close to the tracks, to support basically 2 separate roofs.
Any photos or ideas???