Hey all you vertical types, a question that came up as my girlfriend was reading through Alpine Caving Techniques (ACT) 3rd edition. In ACT they make the case that bent (normal to me) hangers are not that great and suggest that rolled hangers should be used on vertical walls and that clown hangers should be used on roofs. They further state that normal hangers should never be used on roofs. So, my question is, what hangers do you use when (and why)?
I'm asking this because I exclusively use normal hangers (or glue-ins which is a different can of worms) and am mulling over if there is a strong reason to change in some cases. The main reason I use normal hangers is because they are cheap in stainless (1.50$ or so each). I also think that the safety of normal hangers is well supported by anecdotal evidence from climbing (they just don't fail), at least for fall type loads.
James