WWYD? Secure Pair
I recently visited a facility where security is their top priority. Many of the doors are set to sound an alarm if they are left open for more than 6 seconds. This presents a challenge when carts are being moved through the opening, because the doors need to stay open long enough for the carts, but need to close before the 6-second mark. There are 10,000 employees on-site during a typical day, and leaving a door unsecure / not locked or latched can result in termination of their jobs. Many of the doors are fire doors, which adds some extra complexity to the issue. Almost all of the doors have access-control.