Hand The direction of door travel (swing or sliding) and the locking/security side of a door, i.e., a righthand or right hand (opening out), Iefthand or left hand (opening out).
Handed A product designed or assembled for use only on right hand doors, or only on left hand doors, but not both.
Hardboard Sheet material of compressed fibres.
Hardness The measure of the resistance of a material to indentation, wear or abrasion.
Hardware Set A group of hardware listed in the specification, for a specific opening.
Hardwood Wood from trees having broad leaves in contrast to needles. The term does not necessarily refer to the hardness of the wood.
Headroom The vertical clearance in a room or on a stairway.
Hinge Two jointed plates hinged together and attached to a door and its frame. Serves to support or “hang” the door and allows the door to swing or move. Hinges are classified according to installation method.
a) Full Mortice A hinge with one leaf morticed in the edge of the door, the other leaf morticed in the door jamb.
b) Non-Mortice A hinge which has both leaves, surface fixed onto the door and the jamb.
- Ball-Bearing Hinge A hinge equipped with ball bearings between the hinge knuckles to reduce friction.
- Butt Hinge (or Butt) A hinge morticed into both the door and frame.
3) Concealed Hinge A hinge so constructed that no parts of the hinge are exposed when the door is closed.
Continuous Hinge A hinge designed to extend for the length of the moving part to which it is applied. Also called a “piano hinge“.
5) Double-Acting Spring Hinge A device for hanging a door, permitting the door to swing in either direction and return to a closed position.
6) Fixed Pin Butt A hinge in which the pin is fastened permanently in place, preventing separation of the two leaves.
7) Lift Off Hinge A hinge having only two knuckles, to one of which the pin is fastened permanently, the other containing the pinhole, whereby the two parts of the hinge can easily be separated. These hinges are handed.
8) Loose Pin Hinge A hinge having a removable pin to permit the two leaves of the hinge to be separated.
9) Olive Knuckle Hinge A hinge with an oval-shaped single knuckle.
10) Paumelle Hinge A style of hinge using a single, pivot-type knuckle. Generally modern, or streamlined design.
11) Plain-Bearing A standard hinge without ball, oil-impregnated or anti-friction bearings.
12) Shutter Hinge A hinge designed to swing shutters.
13) Spring Hinge A hinge containing one or more springs to move the door into a closed position. It may be either single or double-acting.
14) Strap Hinge A surface hinge of which both leaves are of considerable length.
15) Surface Hinge A hinge having both leaves secured to the surface of the door and frame.
16) T-Hinge A surface hinge with the short member attached to the jamb and the long member attached to the door.
Hinge Backset Distance from back end of a hinge to edge of the inside door surface
Hinge Jamb Vertical member of a door frame to which the hinges are applied.
Hinge Stile (of a door) The door stile to which the hinges are applied.
Hip Roof A roof with four sloping sides.
Holdback A snib, button or other device which can hold the bolt in the retracted position.
Hook Bolt A lock bolt that hooks onto the strike usually applied to sliding doors.
Hot Rolled Shaping a heated form of metal between rollers.
Hot Working. The process of forming a metal at extremely high temperature.
Hotel Motel Lock A deadlatching locket function developed for hotels and motels to provide a privacy lockout feature to protect the property and privacy of guests. When necessary management may also apply the lockout using an emergency key from outside.
Hub Part of the lock which connects the furniture spindle to the lock mechanism. –