Craftsman 139.53984SRT Manual Del Propietário página 12

INSTALLATION STEP 1
Determine the Header Bracket
Location
To prevent possible SERIOUSINJURYor DEATH:
• Header bracket MUST be RIGIDLYfastened to
structural support on headerwall or ceiling, otherwise
garage door might not reverse when required. DO NOT
install header bracket over drywall.
• Concreteanchors MUST be used if mounting header
bracket or 2 x 4 into masonry.
• NEVERtry to loosen, move or adjust garage door,
springs, cables, pulleys, brackets, or their hardware, all
of which are under EXTREMEtension.
• ALWAYScall a trained door systems technician if
garage door binds, sticks, or is out of balance. An
unbalancedgarage door might not reversewhen
required.
Vertical
Center_ine
Finished
Ceiling
2x4 Structural
Supports
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
(1.22 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 14) 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 2 x 4
(on wall or ceiling), use lag screws (net provided)
to securely fasten the 2 x 4 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 walt 2" (5 cm) above the high point. This
height will provide travel clearance for the top edge
of the door.
NOTE: Door clearance brackets are available for
sectional doors when headroom clearance is less
than 2" (5 cm). See accessory page 39.
Proceed toStep _ page 14.
Ceiling
Header Wall
I--2" (5cm) Track
i
Highest Point
of Travel
Door
Sectional door
with curved
track
One-piece
door with
horizontal
track
Header Wa_l
Track
H_rhraeSvte P°int
Highest Point
of Travel
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