I have to finish the bottom part of my layout, everything is concrete to the bottom. I was thinking instead of laying more concrete to make the bottom all trestle. If you can see by the pics how much my yard slopes down, I have a big grade going up, I am trying to make it more level.I have a big supply of cedar so I thought of raising the bottom part of the layout with a trestle.The tunnel would have to be moved and the whole circle and up to the green bridge would be trestle.
I have double cross bars on each side of my bottoms and they just rest on the gravel. Been like that for 15 years about. They are redwood. Stained them the once, when I made them, been left alone since. Jerry