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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 stop doors from sagging. They are often used in schools, hospitals, hotels, offices, airports, stadiums, storefronts and many other commercial and industrial buildings.
They are generally made from extruded architectural aluminum and most are anodized to resist corrosion. To meet building fire codes, they can be made with up to a three-hour fire rating.
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