The basics of door hardware specifications

Designed for more frequent automatic use, electromechanical system operators are often used on cross-corridor doors.


An interconnected lock comprises two locks that are connected together, so operating the lever handle will retract both the latch bolt and deadbolt simultaneously. The latch set is either a cylindrical or tubular lock with a deadbolt above it. These locks are most commonly used on dwelling unit entrance doors in multifamily buildings.


Deadbolts are available with a single or double cylinder. The single-cylinder deadbolt operates by a key on the outside and a thumb turn on the inside. A double-cylinder deadbolt requires a key for unlocking on both sides of the door and cannot be used on doors required for egress, except in limited locations where specifically allowed by the adopted codes. In these cases, all criteria stated in the adopted code must be met.

Electrified hardware

Electrified hardware uses power to control the locking and unlocking of the door. Most electrified hardware is available in one of two functions: fail safe or fail secure. Fail safe and fail secure refers to the status of the secure side (key side, outside) of the door. Most electrified hardware allows free egress from the egress side (inside) of the door.

Electronic locks

An electronic lock is controlled by a reader, such as a keypad, card reader, or biometric terminal. There are two main types of electronic locks.

Standalone locks and readers

Standalone electronic locks use the same credential as networked locks. However, they are not connected to access control software, so they require the user to physically go to each lock to administer access rights and retrieve tracking information.

Networked locks

Networked electronic locks are connected to an access control system. They allow the system manager to easily change access rights and track movement throughout the facility from anywhere they are connected to the network.

Electromechanical locks

An electromechanical lock is an electrified lockset that can be controlled by a card reader, remote release, or other access control device. Most electromechanical locksets allow free egress at all times.

Electromagnetic locks

An electromagnetic lock is an electromagnet that mounts on the frame, with a steel armature mounted on the door. When power is applied to the magnet, it bonds to the armature, securing the door. Electromagnetic locks are only available in fail-safe mode. They unlock when power is removed.

Electric strikes

An electric strike replaces the regular strike for a lockset or panic hardware. It is used as part of an access control system to provide added security and convenience such as traffic control and remote release. An electric strike is typically paired with a storeroom function lockset or panic hardware, so access is controlled by the electric strike but egress is unaffected.

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