My only comment is I want the top rail horizontal to resist wind load at the top. I like this design, with the top rail being a cap, that protects the endgrain of the pickets. I'm not sure about putting the bottom rail in the dirt, however.

My only comment is I want the top rail horizontal to resist wind load at the top. I like this design, with the top rail being a cap, that protects the endgrain of the pickets. I'm not sure about putting the bottom rail in the dirt, however.
