I haven't a clue as to what I'm seeing here..You built a helix. OK, but what is this box for ? How is this employed in staging and in relation to the helix ? Is this a cassette of some kind ? M
This crude 'mock-up' was to judge how much clearance I would have between my two shelves/decks that surround the room,...the staging shelf being located 8" below the main layout deck above it (actually only 7 1/4" between the two as the thickness of the upper deck is 3/4").
That metal square tube is representative of the 'bench work framing' I am making use of. Rather than traditional wood eggshell type support of the plywood roadbed (subroadbed, technical), I am going to use long horizontal pieces of that 2" square metal tubing to support my plywood shelves/decks. There will be segments of the metal tubing attached to the wood studding of the walls, and there will be some free-standing long tubes of that metal at the outer edges of the shelves.
This will greatly minimize my benchwork framing members. and will make my total thickness of the shelf/deck only a potential 2" thick. You will see this more clearly very soon when I begin to install the staging deck.