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For the purpose of this chapter, certain terms are defined as follows:
AUXILIARY LOCKING DEVICE is a secondary locking system added to the primary locking system to provide additional security.
BURGLARY-RESISTANT GLAZING MATERIALS are materials which are defined in ANSI/UL Standard 972.
DEADBOLT is a lock bolt which must be actuated by a key, a knob or thumb-turn and when projected becomes locked against return by end pressure, and does not have spring action, as a latch bolt does. A SINGLE CYLINDER DEADBOLT is a deadbolt lock which is activated from the outside by a key and from the inside by a knob, thumb-turn lever or similar mechanism. A DOUBLE CYLINDER DEADBOLT is a deadbolt which can only be activated by a key from both interior and exterior.
DEADLATCH or DEADLOCKING LATCH BOLT is a spring-actuated latch bolt having a beveled end and an
incorporated plunger which, when depressed, automatically locks the projected latch bolt against return by end pressure.
PRIMARY LOCKING DEVICE is the single locking system on a door or window unit whose function is to prevent unauthorized intrusion.
WINDOW LOCKING DEVICE is part of a window assembly which is intended to prevent movement of the movable sash, and may be the sash lock or sash operator.