Question about fire curtains on a stage. In 2006 IFC or 2009 IFC, is there a code that says people have to check them periodically and make sure they are hooked up right, will drop when needed, etc? I make people test fire doors annually, and was just including the curtains in that, til someone asked me why I'm calling curtains "doors". I don't know. I just thought it's a pretty complicated looking system, hard to see even, and it's doing the same job as fire doors in separating occupants from fire, so it's a good idea to check? Some I've seen with fusable links, some with ropes and axes. Is there a good source out there for info just for explaining how the pulleys, ropes, weights, etc all work? Do you require an annual test be done? Have you seen any that seem to be hung up wrong?