[jackson1442]

I believe the general policy in the States is "one swift motion" to exit a room which is why you see mostly crashbars and lever handles as egress, mostly on push doors for the primary egress path.

In secured areas where they want you to swipe out or places where they might get tripped accidentally, they sometimes have like a 15 second lockout before actually tripping the door.

I've been in just one server room and they just had a motion-deactivated maglock tied to an electric strike so in the case of a power outage a simple mechanical lock could be opened but otherwise you need to badge in/out.