three-point lock

three-point lock

A device which locks the active leaf of a pair of doors at three points; sometimes required on doors having a 3-hr fire rating.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
If this does not help, one's insurance company will eventually request the installation of a three-point lock and perhaps even an alarm.
These doors also feature a three-point lock that secures the door at the head, jamb and sill--earning it the industry's highest recognized security rating.
Manufactured from 18-gauge steel with a 16-gauge steel base, the cabinet includes a flush-mount handle with a three-point lock and a durable powder-coated finish.
Front doors have a security three-point lock complete with double bolts, letter plate and security chain.