When using 2018 IBC 1010.1.9.4 Item 2 allowing the use of a double key deadbolt, the code doesn't explicitly say "exit" doors. It just says "main door or doors". For a vestibule, do you allow the use of this provision on both the interior vestibule door and the exterior exit door? Or just the exterior exit door?
The commentary appears clear that the provision is only for the main exit; the interior vestibule door would be an exit access door.
The locking arrangement is not permitted on any door other than the main exit and, therefore, the employees, security and cleaning crews will have access to other exits without requiring the use of a key.
The commentary appears clear that the provision is only for the main exit; the interior vestibule door would be an exit access door.
The locking arrangement is not permitted on any door other than the main exit and, therefore, the employees, security and cleaning crews will have access to other exits without requiring the use of a key.