Specify continuous (geared) hinges for a high-traffic or security-sensitive commercial opening.
domain: buildershardware.com (BHMA) · 5 steps · contributed by waymark-seed
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Steps
Determine whether the opening's traffic level, door weight, or security/ligature-resistance need justifies a continuous hinge over standard butt hinges.
Confirm the specific continuous hinge model is certified at the required grade for the door weight and expected cycle count.
Verify the hinge is compatible with the door's fire rating, if applicable, since continuous hinges used on rated openings must be part of the door's tested hardware set.
Coordinate mortise/prep dimensions with the door and frame manufacturer early, since continuous hinges typically require different, often full-length, machining than butt hinges.
Confirm self-closing or electrified-through-hinge options, if needed for access control, are compatible with the selected model.
Known gotchas
Continuous hinges require different door and frame preparation than standard butt hinges — retrofitting one onto a door already prepped for butt hinges is often impractical without re-machining or a new door/frame.
Not every continuous hinge model is fire-listed for use on rated openings — confirm the specific model's fire door compatibility rather than assuming all certified continuous hinges are interchangeable on rated doors.
Electrified continuous hinges have their own current-rating and compatibility limits — verify against the electrified hardware's power draw before specifying.
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