Chamberlain Whisper Drive SECURITY+ 459950 Manuel Du Propriétaire page 13

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. Drill 3/16" pilot
holes and fasten the bracket securely to a structural
support with the hardware provided.
HARDWARE SHOWN ACTUAL SIZE
Lag Screw
5/16"-9x1-5/8"
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 away from 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.
6" (15 cm) Maximum
Ceiling Mounting Holes
UP
13
Wall Mount
UP
Optional
Mounting Holes
Header
Wall
2x4
Header
Structural
Bracket
Support
Horizontal
Line
Highest Point of
Garage Door Travel
Header
Bracket
Door
Spring
Garage Door Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage Door
Lag Screws
5/16"x9x1-5/8"
Door Spring
Garage
Door
Vertical
Centerline
of Garage Door
– Finished Ceiling –
Vertical Centerline
of Garage Door
Lag Screws
5/16"x9x1-5/8"
Header Wall