Risers

Scot, 7 1/2" should be enough even for the tallest scale cars. Even with the thickness of the track, you will still have 7".  Best wishes on the surgery.

Hi Scott just for info I just measured a Lionel tunnel portal, one of the plastic type and it's 5 3/4 inches to the top of the arch and has a 4 1/4 inch width at the bottom. So like Elliot said that's high.

Larry

Scott:

Here are a couple of threads on grades with a lot of information.  Click on the underlined phrase to access.

Grade Question 1

Grade Question 2

Thank you all for the information I went and took my largest car and I figured what I needed. And I did some reading Mike thanks for adding your links I read them and they wear helpful. I also ordered a few pieces I needed but they will come in when next Friday or Sat. And I'll be dealing with the surgery and recovering but I have them for after I get better.  Thanks guys     Scot

Best of luck with your surgery! May you be back working on the layout in the very near future!

--Greg