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Hardware: Also Known as Door Furniture

Door furniture (British and Australian English) or Door hardware (North American English) refers to any of the items that are attached to a door or a drawer to enhance its functionality or appearance.

Design of door furniture is an issue to disabled persons who might have difficulty opening or using some kinds of door, and to specialists in interior design as well as those usability professionals which often take their didactic examples from door furniture design and use.


Items of door furniture fall into several categories, described below.


Hinges

A typical peep hole in a door, allowing the person to see who is outside the door without opening it.

See main article: Hinge


A hinge is a component that attaches one edge of a door to the frame, while allowing the other edge to swing from it. It usually consists of a pair of plates, each with a set of open cylindrical rings (the knuckles) attached to them. The knuckles of the two plates are offset from each other and mesh together. A hinge pin is then placed through the two sets of knuckles and usually fixed, to combine the plates and make the hinge a single unit. One door usually has about three hinges, but it can vary.


Handles

See main article: Door handle

Doors generally have at least one fixed handle, usually accompanied with a latch (see below). A typical "handle set" is composed of the exterior handle, escutcheon, an independent deadbolt, and the interior package (knob or lever). On some doors the latch is incorporated into a hinged handle that releases when pulled on.


See also:

  • Doorknob - A knob or lever on an axle that      is rotated to release the bolt.
  • Crash bar


Locks

See main article: Lock

A lock is a device that prevents access by those without a key or combination, generally by preventing one or more latches from being operated. Often accompanied by an escutcheon. Some, particularly older, doors will have a keyhole accompanying the lock.


Fasteners

Most doors make use of one or more fasteners to hold the door closed. Typical or common fasteners include:

  • Latch - A device that allows one to  fasten a door, but doesn't necessarily require an external handle
  • Bolt - A (nearly always) metal shaft usually internal      to the door, attached by cleats or a specific form of bracket, that slides  into the jamb to fasten a door. 
    • Latchbolt - A bolt  that has an angled surface which acts as a ramp to push the bolt in while       the door is being closed. By the use of a latchbolt, a door can be closed       without having to operate the handle.
    • Deadbolt - Deadbolts usually extend       deeper into the frame and are not automatically retractable the way  latchbolts are. They are typically manipulated with a lock on the outside       and either a lock or a latch on the inside. Deadbolts are generally used       for security purposes on external doors in case somebody tries to kick       the door in or use a tool such as a crowbar      or a hammer and screwdriver      etc.
  • Strike plate - A plate with a hole in the      middle made to receive a bolt. If the strike is for a latchbolt, it typically      also includes a small ramped area to help the bolt move inward while the      door is being closed. (Also known as just "strike") It's      also available as electric strike which allows you to      open the door even though the mechanical lock is locked.


Accessories

Numerous devices exist to serve specific purposes related to how a door should (or should not) be used. 


See:

A number of items normally accompany doors but are not necessarily mounted on the door itself, such as doorbells.

Continuous hinge
Continuous hinge