Glossary of Terms

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B

  1. Back Check

    Optional feature in hydraulic door closers slowing the opening swing of door somewhere between 60 and 85 degrees of opening. Designed to protect an object behind the door. Not intended to act as an overhead stop.

    Related Categories –
    Door Closers and Operators
  2. Backset (of a Lock)

    The horizontal distance from the lock front or edge of the door to the center line of knob hub, keyhole or cylinder. (Measured from the high side of a beveled door.) 

    Related Categories –
    Locks, Cylinders, Cores, Keyblanks
    Related Terms –
    Lock Set
  3. Bored Lock (or Latch)

    Lock or latch whose parts are intended for installation in holes bored in a door. 

    Related Categories –
    Locks, Cylinders, Cores, Keyblanks
  4. Box Strike

    A strike that also provides a strike box to protect the bolt openings. 

    Related Categories –
    Locks, Cylinders, Cores, Keyblanks
    Related Terms –
    Electric Strike
    Strike
    Strike Box
  5. Butt (Hinge)

    A type of hinge designed for mortising into the edge of the door and into the rabbet of a door frame. 

    Related Categories –
    Hinges and Pivots
    Related Terms –
    Hinge
Glossary
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