Keith Nelsen from Lindquist Security Technologies sent me the video below – Keith is a firefighter as well as having a long career in the door and hardware industry, so he’s always got good insight to share.
There are a few interesting things about this video…check it out and then scroll down.
- At first I thought someone broke into the ATM, but it looks like what happened is that the people went into the ATM vestibule before 8 pm, and the door automatically locked at 8, trapping them inside. This is exactly why doors need to allow free egress, even “after hours” or when the building/area is not supposed to be occupied. Having the access control system automatically lock the door on a timer would have been fine if the door had allowed free egress. I’m sure the bank has resolved the situation by now.
- I’m wondering if the door had a powerbolt, or if the mechanical hardware just failed (less likely). Assuming that it was a powerbolt, the code requirements would be the same as for a door with an electromagnetic lock. Either there should have been a motion sensor and auxiliary push button, or the hardware on the door should have had a switch to release the powerbolt. Either of these applications would have allowed free egress if everything was functioning properly, but I still don’t like powerbolts because the alignment is critical (affecting security) and sideload pressure can prevent the bolt from retracting (affecting egress).
- Clearly the door did not have NRP hinges, which I would typically specify on any outswinging exterior door, any outswinging door with access control, and some outswinging doors with mechanical locks. NRP = non-removable pin, and prevents the hinge pins from being removed when the door is closed.