Wow, for years, and it's not just me, several people I have worked for too, but around here we have been doing >18", and <42", as an ADA thing. Not that any of us wants to go get a book for $60+ bucks to just to find out plug and switch hieghts on a half page. And have a book that also contains how much turning radius area is needed in a toilet, and everything else too.
Anyway, thanks gents.
