Wedged tenons - part 2

I wanted to make a series of posts about wedged tenons, but never got past the first one... And now Brad Ferguson just made my live a lot easier with his latest post where he covers a few other wedged through tenons.

You must remember that the wedges must go perpendicular to the grain of the piece that has the mortise or there is a risk of splitting the piece when you drive those wedges into the tenon.