| Norton® Door
Controls General Information
Regular Arm, Top Jamb and Parallel Arm (cont'd.)
Top Jamb
The closer body is mounted on the frame face above the
door, opposite the door's hinge side. The forearm is mounted on the top rail of the door
by means of a mounting shoe. The top jamb closer is particularly suitable for doors with a
narrow top rail, such as an aluminum-and-glass "store front" door. Finally, the
geometry of the assembly makes a top jamb closer somewhat more power-efficient than a
parallel arm closer.
Parallel Arm
The closer body is mounted on the top rail of the door
opposite the hinge side of the door. The forearm is mounted to the underside of the frame
(the soffit) by means of a soffit plate, and requires no space on the frame face. The arm
is parallel to the door, and therefore less accessible to mischief. The depth of the
door's top rail is an important consideration when using this method of mounting.
Hand of Door
Many door closers are non-handed. This means they can be
placed on a door in such a way that they will operate a left-opening or a right-opening
door. Even so, some covers, arms or holding devices are handed. In such a case, the hand
of the door should be specified. The illustrations below show how to determine the hand
for door closers and other door hardware.
|
