The hinge spacing (between hinges) for a 6'8" door or frame with 2 pair of hinges is 19 61/64".
Frame Locations - from the underside of head to the centerline of each hinge is:
Door Locations - top of door to centerline of each hinge is:
The centerline locations listed would apply to all hinge sizes 3 1/2", 4", 4 1/2", 5" etc.
Top to top hinge locations will vary based on hinge size used. To determine top to top locations subtract half of hinge size being used from the centerline locations listed.(Ex: 4 1/2" hinges subtract 2 1/4" from each centerline location)
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