Apple Peak Railroad and Coal Co.

[tetters]

There is a very good reason that 1/2" plywood is the typical thickness, and some people even use 3/4" plywood.

Agreed.

I used 3/8 ply on my first layout and noticed sagging in some spots even with 2x3 dimensional lumber framework I had built up underneath it. This time I used 3/4 ply on top of my frame work. I also rebuilt one section of the frame work with 3/4 plywood ripped into 3" widths. I only wished I had used 3/4 plywood throughout the framework the first time around. Ah...live an learn.