9
T Y P I C A L I N S T A L L A T I O N
DETERMINE HEADER BRACKET MOUNTING LOCATION
The trolley operator is generally mounted over the center of the door. However, off center
mounting may be required due to interfering structures or location of door stile / top section
support. Typically, the operator may be mounted up to 24" (60.96 cm) off center on torsion
spring doors. Extension springs require center mounting.
1
Mark the center of the door
Mark the center line of the door.
Extend the line on to the header wall and
the ceiling.
Level (Optional)
2
Determine and mark the highest point of door travel
Level
High Point of
Door Travel
Header Wall