Probably not really necessary given how shallow it is, but I had fun hand chiseling a very slight birdsmouth for some shed rafters. After some practice (and sharpening), I could get most of the material in one cut. Demos I saw all used a circular saw, so thought I’d share something different.
Nearly flat yes, 3" over 9’.
Interesting choice.
It’s for a green roof. Just enough slant to drain standing water but mostly flat for dirt/plants to stay on. Or that’s the intent.