Originally Posted by
foxtrot
Looks safe to me, on that pitch anyway. A vastly different pitch (especially steeper) it may not. By the picture, it would have no angular force on the ridge. (To come over the ridge, it would have to "hop up". The force is compression - I could see it maybe indenting a shingle at the worst.
The only risk might be if it were to somehow fall over... like if you were using it to swing on the side of the house or something. If that tips, bye bye....
(this is nearly my first post in this thread, ever [mop] ) or at least my first logical one.