[Shop-talk] Attic storage - track and platform system

[Brian Kemp <bk13@earthlink.net>]

The talk about attic storage has me again wondering about a track and 
platform system - think railroad.  Has anyone made or seen a track that 
could move 2' x 4' plywood platforms without too much resistance?  
Something like this would allow me to access most of the seasonal stuff 
I occasionally need without having to climb in the attic.  My lower 
pitched California roof also means I have to crawl everywhere up in the 
attic.
My initial thought was four fixed castors at each end of the platform.  
Two vertical to carry the load and two horizontal to ride between the 
rails and keep the platform on track.  The track would probably be 2x4's 
across the joists and a double layer of 3/4" plywood cut for the 
corners.  I'm not sure what the radius would need to be, but I would 
like at least part of an oval.  I probably could not move cars that made 
a full oval.
The cars would be joined with a 1x2" of enough length that the cars 
wouldn't touch on the corners.
I also had a thought to use plastic pipe for the track - conduit, ABS, 
or PVC cut in half to form a channel with only the vertical wheels.
My goal here is to have a system that is easy to get in and once in, 
means I don't have to climb up in the attic and crawl around.
Any been there, done that is appreciated.

Thanks,

Brian
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