Installation Section: Pages; Determine Header Bracket Location; Sectional Door - Chamberlain 1280 Owner's Manual

Installation Step 1

Determine Header Bracket Location

Installation procedures vary according to
garage door types. Follow the instructions
which apply to your door.
SECTIONAL Doors and One
Piece Door With Track
Header
Wall
• 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.
Proceed to Step 2, page 10.
Installation Section: Pages 8 – 23
Finished
Vertical
Ceiling
Guideline
2x4
Vertical
Guideline
Door

Sectional door

with curved track
If the header bracket is not rigidly fastened to
a structural support on the header wall or
ceiling, the safety reverse system may not
work properly (see page 26). The door might
not reverse when required, and could cause
serious injury or death.
The garage door springs, cables, pulleys,
brackets and their hardware are under extreme
tension. Do not attempt to loosen, move or
adjust them yourself. Serious personal injury
or death could result. Call for garage door
service.
Structural
Supports
• Close the door and mark the inside
vertical centerline of the garage door.
• Extend the line onto the header wall
above the door.
Remember, you can fasten the
header bracket within 2 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 (refer to page 10)
when clearance is minimal.
If you need to install the header bracket
on a 2x4 (on wall or ceiling), use lag
screws (not supplied) to securely fasten
the 2x4 to structural supports as shown
here and on page 9.
Ceiling
Header
Wall
2" Track
Highest Point
of Travel
8
WARNING
Header
Wall
2"
Highest Point
of Travel
Door
One-piece door with
horizontal track
Track