I've often had elevated loops of track.
Presently I've got an oval of track on 1/2 inch plywood with 2x4 "legs". I'm seeing a little warping in the wood leading my non-cruise equipped locos to struggle in areas.
I'd like to do a similar, less "bulky" system but one that is still strong enough to hold the largest of my engines (Railking Imperial articulated steam
and diesels).
I'm thinking of using threaded steel risers but want something reasonably attractive in appearance as well.
The pre-made Lionel or MTH versions would be good but not very practical as there is lots of track, structures, etc in the way and I need some room for large trains to move through curves.