Electric strike

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Electric strike

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Electric strike with monitoring contact

Electric strike is an access control device used for doors. It replaces the fixed strike faceplate often used with a latchbar (also known as a keeper). Like a fixed strike, it normally presents a ramped surface to the locking latch allowing the door to close and latch just like a fixed strike would. However, an electric strike's ramped surface can, upon command, pivot out of the way of the latch allowing the door to be opened without the latch being retracted (that is, without any operation of the knob) or while excited the knob or lever can be turned to allow egress from the secured area. These devices are commonly used for security and access control applications.

Operation

The operation of an electric strike is controlled by an electrical signal from an access control system, keypad, card reader, or other remote control device. It can be configured to lock or unlock with the application of power, known as "fail-safe" or "fail-secure" respectively. A fail-secure electric strike remains locked even in the absence of power, whereas a fail-safe electric strike unlocks when power is lost, ensuring safety during emergencies like power failures.

Types

Electric strikes come in various configurations to accommodate different types of doors, frames, and locking mechanisms. The two main types are:

• Rim electric strikes designed for rim exit devices on emergency exit doors.
• Mortise electric strikes for use with mortise locks, often found in commercial buildings.

Installation

Installation of an electric strike requires modification of the door frame, which can vary in complexity based on the door material and the type of electric strike. Proper alignment is crucial for the efficient operation of the lock and strike.

Applications

Electric strikes are used in a variety of settings including commercial, industrial, and residential buildings. They are particularly useful in controlled or restricted areas where access needs to be regulated. Schools, offices, and government buildings are common places where electric strikes may be employed for enhanced security and convenience.

Advantages

The primary advantage of electric strikes is their ability to control access without requiring a manual key. They offer flexibility in access control systems, allowing for the integration with various electronic devices for user authentication. Additionally, electric strikes can be part of a comprehensive security system, including CCTV, alarms, and remote monitoring.

Disadvantages

One of the main disadvantages is the need for electrical power, making them potentially vulnerable during power outages (except for fail-safe models). Installation can also be more complex and costly compared to traditional mechanical locks.

See Also

• Access control
• Magnetic lock
• Door security
• Biometrics

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