Update
I have big ideas but I'm a reasonable person. The helixes are biting off more than I can chew. New plan...
So it's 24x10 with the ceiling at 9' and 12' on the 24' runs. On the lower end I'm mounting 12" sheets of 1/4" acrylic as a shelf across. At each end will be a 4% grade Woodland Scenics foam trestle.
That gets me to 7'7" so the acrylic shelf on the 10' walls will be mounted at that height also with a trestle on each side getting me another 7".
I'm then at 8'2" on the 24' long high wall.
I've found some 3D 1/2" deep buildings that will take advantage of the addition height from the track to the ceiling on the high wall.
Also I've abandoned the use of the Lionel passenger cars and will be modifying New York Central MTH RailKing Streamlined cars as NJT. That should balance the line much better.
The train will be set closer to the wall to leave room on the acrylic shelf to catch a possible derailment.
I'm building the layout on the ground this week for testing.
If the 12" of shelf isn't enough to protect the train in a derailment I plan on mounting eye bolts above and connecting safety lines as a barrier from anything falling as well as addition stress support.
Any advice on track brand, corner track size, depth from wall, trestle positioning, shelf thinkness/dimensions or can anything you can think of would be a help.
I appreciate all the advice I've gotten here and you've likely saved me from jumping into something that really isn't for someone doing their first layout.
