Installation; Determine The Header Bracket Location; Sectional Door And One-Piece Door With Track - Craftsman 139.53977SRT Manual Del Propietário

INSTALLATION STEP 1
Determine the Header Bracket
Location
To prevent possible SERIOUSINJURYor DEATH:
•Headerbracket 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.
• Concrete anchors MUST be used if mounting header
bracket or 2x4 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 reverse when
required,
Vertical
Centerline
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
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".)
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" 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". See accessory page 39.
Proceed to Step 2, page 14.
Ceiling
Header Wall
i 2,,
Highest Point
of Travel
Door
Track
I
Sectional door
with curved
track
One-piece
door with
horizontal
track
Header Wall
: 2" Track
Highest Point
of Travel
12