Install The Header Bracket; Lag Screw 5/16"-9X1-5/8; Lag Screw 5/16"-18X1-7/8 - Chamberlain 3280-390 1/2 HP User Manual

INSTALLATION STEP 2

Install the Header Bracket

You can attach the header bracket either to the wall above
the garage door, or to the ceiling. Follow the instructions
which will work best for your particular requirements. Do
not install the header bracket over drywall. If installing
into masonry, use concrete anchors (not provided).
WALL HEADER BRACKET INSTALLATION
• Center the bracket on the vertical centerline with the
bottom edge of the bracket on the horizontal line as
shown (with the arrow pointing toward the ceiling).
• Mark the vertical set of bracket holes (do not use the
holes designated for ceiling mount). Drill 3/16" pilot
holes and fasten the bracket securely to a structural
support with the hardware provided.
HARDWARE SHOWN ACTUAL SIZE
CEILING HEADER BRACKET INSTALLATION
• Extend the vertical centerline onto the ceiling as shown.
• Center the bracket on the vertical mark, no more than
6" (15 cm) from the wall. Make sure the arrow is
pointing toward the wall. The bracket can be mounted
flush against the ceiling when clearance is minimal.
• Mark the side holes. Drill 3/16" pilot holes and fasten
bracket securely to a structural support with the
hardware provided.
The nail hole is for positioning
only. You must use lag screws
to mount the header bracket.
Lag Screw
5/16"x9x1-5/8"
Ceiling Mounting Holes
CEILING MOUNT ONLY
2x4
Structural
Support
Horizontal
Line
Highest Point of
Garage Door Travel
Door
Spring
UP
Garage Door
9
Wall Mounting Holes
CEILING MOUNT ONLY
The nail hole is for positioning
only. You must use lag screws to
UP
mount the header bracket.
Optional
Wall Mounting Holes
Header Wall
Header
Bracket
Vertical
Centerline of
Garage Door
– Finished Ceiling –
Vertical
Centerline of
Header
Garage Door
Bracket
6" (15 cm)
Maximum
Lag Screws
5/16"-9x1-5/8"
Vertical
Centerline of
Garage Door
Vertical
Centerline of
Garage Door
Lag Screws
5/16"-9x1-5/8"
Door Spring
Garage Door
– Header Wall –