Emergency egress is the path people take out of a building during an emergency, and the hardware that keeps it usable: panic bars, exit devices, delayed egress and free-egress release. Life safety code governs it, and no access control decision may block a required exit.
Egress is a building code subject before it is a security subject. Hardware choice follows from that order, not the other way round.
Egress and access control
A controlled door still has to open from the inside without a credential. Electronic locks must release on the exit side, and a delayed egress device must alarm and release within the limit the code sets. These requirements come from building and fire code and vary with occupancy.
Hardware that keeps the path clear
Panic hardware, exit devices, door closers and clear signage all support the path. So does routine testing: a bar that has not been pushed in a year may not release. Keep storage out of exit routes, and check that a magnetic lock’s release button or sensor is reachable and labeled.