[EricH]

For anybody that is interested, here's how I got those estimates I posted earlier:

Section 2 has a picture of the grids. The low one is about the height of the top of the diamond plate; the middle one is about the height of the team ID box. While not called out, from past experience I know the heights of both (3.5-4 ft and 6.5-7 ft respectively). I guessed that the high one would be about the same height above the middle as the middle was above the low one.