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Equipment or materials to which has been attached a label, symbol or other identifying mark concerned with the product evaluation and by whose labeling the manufacturer indicates compliance with appropriate standards of performance.

A door that conforms to all of the requirements and procedures of the required labeling authority and has attached the proper identification label. Ratings for labels include: Fire Resistance, Temperature Rise, Sound Transmission and Bullet resistance.

A frame that conforms to all of the requirements and procedures of the required labeling authority and is embossed with or has attached the proper identification label. Ratings for labels include: Fire Resistance, Sound Transmission and Bullet Resistance.

A spring-loaded beveled bolt that projects into a strike, holding the door in a closed position.

The speed of the door during the last few degrees of closing. Allows latching and prevents slamming.

or Lead Wrapped - Pertains to a lockset, door or frame that has a lining or covering of lead to prevent the passage of radiation. Generally used in hospital applications.

(Light Emitting Diode) – A solid state device, or diode, that gives off virtually heatless colored light when electric current is passed through.

The divisions of a master key system into hierarchies of access.

A flat or bar-like grip that is used to actuate a locking or latching mechanism or simply as a decorative pull.

A voltage loss occurring between two points in a circuit. Such loss is due to resistance or, usually, too small conductor.

The part of a lock strike that projects from the frame face and which that latchbolt rides. The measured lip of strike is very important when applied trim is used on the frame, creating a deeper reveal for a door opening.

Equipment or materials which is included in a published list concerned with the product evaluation and whose listing states that either the equipment or materials meets appropriate designated standards or has been tested and found suitable for a specified purpose.

A device which uses or consumes electrical power. Example: Electric Strike.

The box type shell containing the lock mechanism. Term usually used in conjunction with a mortise lock.

(of a door) - The stile of a door to which the lock or latching devices are applied. (Terminology is usually applied to wood doors)

An emergency protocol that will lock some or all of the doors in a building or campus, either to protect occupants from an external threat or to prevent people from entering or exiting certain areas of the building.