| Glossary of Door and Frame Terms A number of basic terms are used in the description of doors, frames
and the application of door closers to them. Knowledge of these basic terms will provide a
better understanding of this catalog.
Door Top Rail:
The horizontal rail at the top of the door.
Rabbet: The section of the door
frame recessed to receive the door.
Soffit: The flat surface on the
underside of the frame between the vertical frame stops.
Stop: The part of the frame against
which the door closes.
Frame Face: The exposed part of the
frame which is generally parallel to the wall on metal frames. On wood frames this would
be the frame molding.
Reveal: The distance from the frame
face to the surface of the door.
Norton Door Control Terms
Applications
Regular Arm: A type of door closer
installation. The closer is mounted on the hinge side top rail of the door. The arm is
attached to the frame face at a right angle to the door.
Parallel Arm: A type of door closer
installation. The closer is mounted on the opposite to hinge side top rail of the door.
The arm is attached to the frame soffit parallel to the door.
Top Jamb: A type of door closer
installation. The closer is mounted on the opposite to hinge side frame face, above the
door. The arm is attached to the top rail of the door at a right angle to the door.
Slide Track Closers: A type of door
closer installation. The closer is mounted on either the hinge side or opposite hinge
side. The slide track is mounted to frame.
Corner Bracket Closers: A type of
installation when the closer cannot be mounted to either the door or the frame. The
bracket is mounted on the upper corner of the hinge edge frame opposite the hinge. The
closer is mounted to the bracket and the arm is attached to the top rail of the door at a
right angle to the door.
General Terms
Adjustable Backcheck Cushioning: A
term used to indicate that the strength of "backcheck cushioning" in the door's
opening cycle can be regulated by means of a valve in the closer body.
Adjustable Backcheck Position: A
term used to indicate that the location where "backcheck cushioning" occurs in
the door's opening cycle can be adjusted by means of a valve in the closer body. This
valve provides a range of 20° of door opening where the backcheck can be set.
Adjustable Latch Speed: A term used
to indicate that a door's speed can be regulated in the "latch" range of the
closing cycle (approximately the last 5° of closing) by means of a valve in the closer
body.
Adjustable Sweep Speed: A term used
to indicate that a door's speed can be regulated in the "sweep" range of the
closing cycle (fully open to 5° from closed) by means of a valve in the closer body.
Adjustable Delayed Action Closing: This
special door control feature adds a third speed range to the closing control cycle. It
becomes effective when the door is opened and released at any point beyond 70°. This
delayed closing enables traffic to clear the opening before the normal closing cycle
starts.
Hand (of a door): A term used to
describe the direction of a door's swing. From a position on the opposite to hinge (push)
side of the door, a right hand door swings away to the right. Conversely, a left hand door
swings away to the left.
Handed: A term used to describe a
product that can only be used with either a right hand door or a left hand door, not both.
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