Metal Roof Deck Slope

I have sloped (1/2" per foot or less) 3" metal deck on flat wide flange beams at my roof. SDI recommends 1/2" max per foot is OK for deck bearing and welded connections. Is this true for PAF (specifically X-ENP19 PAF) as well? What is the limit on how much the deck can be sloped versus the flat top flange of a supporting steel beam?