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Hinge direction refers to hinges that are non-reversible and must be installed in the proper direction to work as designed.
Physical specifications to consider when searching for industrial hinges include base material, finish material, leaf thickness, leaf length, pin material, pin diameter, knuckle length, open width, hole type, and number of holes.
Butt hinges are composed of two leaves attached to abutting surfaces of a door and frame, joined by a pin. The pin is contained in the knuckle segment of each hinge leaf. Withdraw the pin and the leaves will separate, allowing the mounted door to be easily removed from the frame. The two leaves are each fitted with screw holes. For installation, both leaves of the hinge are usually fully mortised, one into the edge of the door and one into the edge of the frame. When the door is closed, the leaves meet (or butt together) with only the pin knuckles showing.
Half mortised industrial hinges are butt hinges where only one of the leaves is mortised into the door and the other leaf is attached to the surface of the frame. A half surface hinge is mortised into the frame and the other leaf is attached to the surface of the door.
Swing clear hinges are designed for use in hospitals, institutional or commercial buildings for barrier-free applications, wherever doors are required to meet barrier-free codes (ADA) or are required to swing completely clear of the door opening so that wide equipment can pass through without damaging the doors, frames or equipment. A swing clear hinge projects the door at least 90 degrees out from the opening.
