Lockset

A lockset (alternatively lock set) is the hardware and components that make up the locking or latching mechanism that can usually be found on a door or other hinged object but can also include sliding doors and dividers. The components of a lockset can include (but are not limited to) the door handles (commonly both inside and outside), latchbolt, dead bolt, face plate, strike plate, escutcheon, thumbturn, push button, turn button, and other trim. The lockset and associated hardware typically defines a door's function and how a user could (or could not) access the two adjacent spaces defined by the opening associated with the lockset.

The Americans with Disabilities Act of 1990, under Title III, and many state and local governments regulate locksets in buildings occupied by the public. Typically, locksets that employ door knob controlled latches are forbidden for public use in favor of lever handles, which are easier to operate by gravity instead of the grasping and turning required by knobs. Many municipalities also regulate locksets in terms of fire rating, using standards determined more broadly by national or international organizations such as Underwriters Laboratories in the United States or the International Code Council, which are often supplemented by local governmental organizations, e.g. New York City's Materials and Equipment Acceptance (MEA) Division of their Board of Standards and Appeals (BSA), or by local building codes. For example, mandates of building code may outlaw, e.g., E2141/F16 "Double-Keyed Deadbolt" from group occupancies, or require, e.g., F93/F15 on hotel or motel doors.

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