Tom
Chip
Building the Rock Ridge Railroad with the slowest construction crew west of the Pecos.
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
QUOTE: Originally posted by selector Half-inch ply is too heavy for your ramps in your helix, if that is what you just said. A quarter inch would be plenty considering its purpose and weight bearing requirements. In fact, you could easily get away with MDF, doorskin, or masonite cut to shape and lengths, assuming your supports are not only at each quarter of the circle (90 deg apart). BTW, that lone 1/2" in clearance that you will have left is veerrrrryyy tight. Could end up limiting you in what you can run up and down that helix.