HINGES
Hinges can be described as two flaps joined together by a pin through their knuckles, used for hanging a door leaf from its frame. The most commonly used hinges in building are butt hinges, sinkless (nonmortice) hinges, parliament hinges, and back-flap hinges, which are symmetrical and not handed. All other types of hinges are handed, including lift off hinges and rising butt hinges, for which the hand must be stated. For wide and heavy swing doors other hanging devices can be used i.e. a pivot hinge.
The normal rule of thumb for the number of (100mm*) butt hinges to use per door is described below, however, it also depends on the weight of the door e.g. a purpose made solid hardwood entrance door (813 x 2032mm) would require at least three hinges to swing the door.
• Up to 813 x 2032mm- (standard door leaf size) one pair of hinges (2)
• Up to 900 x 2500mm- one and a half pairs of hinges (3)
• Up to 1000 x 3000mm - two pairs of hinges (4)
*100mm Butt hinges are normally used for hanging doors
Butt hinge
Butt hinges are the most commonly used hinge for doors; when the door is shut the two halves are folded tightly together. Each flap is usually morticed (counter sunk) one into the door frame and the other into the hanging stile of the door leaf.
Sinkless hinge
Sinkless hinges can also be referred to as non-mortice or surface fixed (flush) hinges. A sinkless hinge is a butt hinge which when closed is only as thick as the metal in one of its flaps; the flaps are cut to fit one inside the other. Sinkless hinges are not recommended for hanging solid core type doors.
Parliament hinge
A hinge with two lengthened T-shaped fl aps, joined to form an H. The knuckle (the middle of the cross-bar of the H) projects beyond the face of the closed door or shutter, allowing the door to clear the architrave or as in steel French doors the brick reveal, and to lie flat against the wall when opened. Typically used for steel French doors, window and door shutters.
Projection hinge
A Projection hinge is basically a butt hinge with wide flaps and a knuckle that sticks out, allowing the door to swing open to more than 90°. Similar in function to that of a parliament hinge except a projection hinge is used for heavy duty applications and recommended for hanging solid doors where the door is required to clear the architrave or the brick reveal
Back-flap hinge
A hinge with wide flaps, screw fixed to the face of a door and frame, usually used on a door too thin to be carried on butt hinges e.g. chipboard or Supawood doors.
Rising butt hinge
Hinges which cause a door to rise about 10mm as it opens. They have a helical bearing surface between the two flaps. The door therefore tends to close automatically as well as to clear a carpet when opening
Door Handles
The following information on door handles is intended to illustrate the types available and the categories to which they fall under. The product range per category is too vast to cover in this publication and we suggest you contact one of the suppliers listed in this section for further information.
Lever handles
The following information on door handles is intended to illustrate the types available and the categories to which they fall under. The product range per category is too vast to cover in this publication and we suggest you contact one of the suppliers listed in this section for further information.
Knobs
Can be described as a door handle in the shape of a knob, it is more compact than a lever handle, but more difficult to turn. Knobs are available in the following combinations:
- Knob on rose with separate escutcheon
- Knob with plate
- Knob on backplate
- Knob with WC latch
Pull handles
A pull handle is typically used for opening a door fitted with a dead lock or to open a drawer, kitchen cupboard or BIC door; with the following types of Pull handles available:
- Back to back
- Bolt through
- Face fixed
- Finger pulls
- Flush
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