The ordinary perimeter door should be considered that point where the “physical security” of residential, commercial, and institutional structures begin. Windows are of course important, but FBI crime statistics in years past have routinely indicated that doors are the primary point of entry more than 80 percent of the time
In order to maintain security, it’s necessary to have a combination of mechanical and electronic devices on each door. In addition, electrified locking devices must be capable of automatically releasing the door for immediate egress in case fire is detected — which requires added integration between access control and a listed fire alarm system.