Install The Header Bracket - Chamberlain WHISPER DRIVE Security+ HD900D Owner's 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. 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"x9x1-5/8"
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
Vertical
Garage Door
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