(Covered in ANSI/BHMA Standard A156.17) Also called Self-Closing Hinges or Pivots

Clamp Flange. A spring hinge flange which wraps around the edge of the door and is fastened with thru-bolts and nuts.

Double Acting. When a door is so arranged to swing in either direction.

Full Mortise. When one hinge flange or leaf is mortised into the edge of the door and the other to the mortise cutout of the frame.

Full Surface. When one hinge flange or leaf is fastened to the surface of the door and the other to the surface of the frame.

Gravity Pivot Hinge. A pivot hinge arranged so the weight of the door causes it to close from an open position or open from a closed position. They are not listed for use on fire doors.

Half Mortise. When one hinge flange or leaf is mortised into the butt edge of the door and the other to the surface of the frame.

Half Surface. When one hinge flange or leaf is fastened to the surface of the door and the other to the mortise cutout of the frame.

Single Acting. When a door swings in one direction only.

Spring Hinge. A hinge with flanges or leaves which attach to the door and jamb and are connected to the hinge pivot point(s) (barrel). Springs provide energy to close a door from the open position or, in some cases, open a door from the closed position. Single acting spring hinges are often listed for use on fire doors.

Spring Pivot Hinge. A spring hinge employing pivot points at the top and bottom edges of a door.