Determine The Header Bracket Location - Chamberlain 3595C 3/4 HP Owner's Manual

INSTALLATION STEP 1
Determine the Header Bracket
Location
WARNING WARNING
To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to structural
CAUTION
support on header wall or ceiling, otherwise garage door
might not reverse when required. DO NOT install header
bracket over drywall.
• Concrete anchors MUST be used if mounting header bracket
or 2x4 into masonry.
• NEVER try to loosen, move or adjust garage door, springs,
cables, pulleys, brackets, or their hardware, all of which are
under EXTREME tension.
• ALWAYS call a trained door systems technician if garage
door binds, sticks, or is out of balance. An unbalanced
garage door might not reverse when required.
SECTIONAL DOOR ONLY
1. Close the door and mark the inside vertical centerline of
the garage door.
2. Extend the line onto the header wall above the door.
You can fasten the header bracket within 4 feet
(1.22 m) of the left or right of the door center only if
a torsion spring or center bearing plate is in the
way; or you can attach it to the ceiling (see page 9)
when clearance is minimal. (It may be mounted on
the wall upside down if necessary, to gain
approximately 1/2" (1 cm).)
If you need to install the header bracket on a 2x4
(on wall or ceiling), use lag screws (not provided)
to securely fasten the 2x4 to structural supports as
shown here and on page 9.
3. Open your door to the highest point of travel as shown.
Draw an intersecting horizontal line on the header wall
2" (5 cm) above the high point. This height will provide
travel clearance for the top edge of the door.
Header Wall
Ceiling
Header Wall
2" (5 cm)
Highest Point
of Travel
Door
8
Unfinished
Ceiling
OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET
WARNING
2x4
Vertical Centerline
of Garage Door
WARNING
2x4
Structural
Supports
Level
(optional)
Track
Sectional door
with curved
track