Posted By pluto Jason, Do you want the 1. Chief fire officers' response 2. BS 7273 Part 4 response 3. Approved document B (Blg regs) response 4. Fire Safety Order guidance documents response They are all subtly different. !. allows them sometimes, 2. allows them on non critical paths, 3. doesn't allow them and 4. allows them only after a thorough risk assessment. Best bet is to fit delays only where the is no other way of dealing with the security/theft risk. (In my opinion...almost never)

Posted By pluto Bob, I think Jason is asking about time delays fitted to the electronic securing devices on some fire exits. Many exits, including fire exits have some form of additional electo - magnetic securing device in addition to the push bar/pad that you will be familiar with. They are invariably fitted as a security measure, often in the largest retail outlets to stop jonny thief running out and escaping with a bottle of malt whiskey. On operating the push bar the door will not open for anything from 10 to 60 seconds, (as long as the retailer can get away with) until the electro - magnet deengergises. There are lots of safety features, most of which make the rationalle behind the locks rather non-sensical. But hey...you started risk assessment!