(Click on photo to enlarge.)
I don't like the struts that hold up the parapet walls (walls sticking up above the roofline). If those parapets break loose they will peel the skin of the roof back like an onion. Once (If) that happens the rest will come off pretty quick. Maybe not the underlying structure holding up the roof, but the wind and the rain will be able to get in.
There's going to be some funky things happening in the windflow in that area, you'd need a supercomp to model it properly.
He says what he needs is an inside view looking up at the roof structure. He isn't sure whether it is poured, or pre-cast.
I have been googling to try to find an image whenever I catch up with the thread, which isn't often, at this point.