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Dorma headquarters in Ennepetal, Germany. Dorma was a German company that produced door technology systems and allied products. It merged with Kaba Holding in September 2015 and became part of Dormakaba Group. [1]
dormakaba generated a turnover of CHF 2.85 billion in financial year 2022/23, a growth of 3.3 % compared to the previous year. [ 6 ] Since July 1, 2023, dormakaba's organizational structure consists of the global commercial core business Access Solutions and Key & Wall Solutions – supported by Global Functions such as Operations and Innovation.
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 ...
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.
Diagram of a structure featuring plastic hinges. In the structural engineering beam theory, plastic hinge is the deformation of a section of a beam where plastic bending occurs. [1] In earthquake engineering plastic hinge is also a type of energy damping device allowing plastic rotation [deformation] of an otherwise rigid column connection. [2]
A fixed arch bridge, that is one without hinges, exerts a bending moment at the abutments and stresses caused by change of temperature or shrinkage of concrete have to be taken up by the arch. A two-hinged arch has a hinge at the base of each arch (the springing point), while a three-hinged arch has a third hinge at the crown of the arch. [3]
There are numerous mentions of domra in historic documents of this period. [3] In addition, medieval Russian illuminated manuscripts of the Psalter contain images of musicians with necked plucked-string instruments, and some of those miniatures are clearly captioned «depiction of domras». Judging by those images, late medieval Russian domras ...
A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.