What's the rationale for that? It's not a rule in the UK. I'm not sure who's going to be walking on the roof of a building that's on fire.
looking at the linked doc, its so that the roof can easily be opened to let smoke out.
I'm not an expert, but I've not seen in the UK (well apart from thatched roofs) firefighters opening the roof to get access.
looking at the linked doc, its so that the roof can easily be opened to let smoke out.
I'm not an expert, but I've not seen in the UK (well apart from thatched roofs) firefighters opening the roof to get access.