Determine The Header Bracket Location - Chamberlain 1356M Owner's Manual

INSTALLATION STEP 1

Determine the Header Bracket Location

To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural 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.
Installation procedures vary according to garage door
types. Follow the instructions which apply to your door.
SECTIONAL DOOR AND ONE-PIECE DOOR WITH
TRACK
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
(1.2 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 13) 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 13.
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.
Proceed to Step 2, page 13.
Header
Wall
Header Wall
Door
One-piece
door with
horizontal
track
11
- Finished Ceiling -
2x4
Vertical
Centerline of
Garage Door
Ceiling
2" (5 cm)
Track
Highest
Point of
Sectional
Travel
door with
curved track
Header Wall
2" (5 cm)
Door
Structural
Support
Track
Highest
Point of
Travel