Section 1002A — DEFINITIONS — San Francisco Building Inspection Commission Codes

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.