What seems a little sketchy to me is that clamp that doesn't actually go over the bar... (unless, of course, I'm going crazy and I'm seeing odd things, a theory which may have merit)
That's alright, when I started working I found our projectorscreen was hung from a batten using two safety chains looped over the pipe twice and twice over the dalite frame. Not fantastic when you're relying on unrated spring clips to hold a 20# screen.