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An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.
Door guards protect fingers in door hinges by covering the hinge-side gap of an open door, typically with a piece of rubber or plastic that wraps from the door frame to the door. Other door safety products eject the fingers from the push side of the door as it closes.
A geared continuous hinge is a type of continuous hinge used mostly on doors in high-traffic entrances and features gear teeth that mesh together under a cap that runs the length of the hinge. The hinges use a number of fasteners to attach the door to the frame from top to bottom to distribute a door’s weight more evenly along the frame to ...
The parts included in the typical US mortise lock installation are the lock body (the part installed inside the mortise cut-out in the door); the lock trim (which may be selected from any number of designs of doorknobs, levers, handle sets and pulls); a strike plate (or box keep), which lines and reinforces the cavity in the door jamb or frame ...
Architectural ironmongery includes door handles, closers, locks, cylinder pulls and hinges (door furniture), window fittings, cupboard fittings, iron railings, handrails, balustrades, switches and sockets. The term is sometimes used to distinguish between these items and retail of consumer goods sold in ironmongers' shops or hardware stores.
Concrete hinges are hinges produced out of concrete, with little or no steel in the hinge neck, which allows a rotation without a significant bending moment. [1] The high rotations [ 2 ] [ 3 ] result from controlled tensile cracks as well as creep.
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The history of construction traces the changes in building tools, methods, techniques and systems used in the field of construction.It explains the evolution of how humans created shelter and other structures that comprises the entire built environment.