QUOTE: I used rail of the same size as the running rail on eather side. Filed the base until I got the correct flange way then glued it to the ties. Then filled the center with approprite size planks between the rails. Some fileing may be nesessary at the ends of the crossing rails so the flanges dont pick them.
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QUOTE: Originally posted by aspenexile I've used very thin sheet styrene. I just paint it gray and weather it to look like asphalt. It looks great, is cheap, and is easy to trim and shape. It also allows for clearance of the wheel flanges. Good luck...