Chamberlain CG40D 1/2 HP - Manual (Page 13)

13
Lag Screws
5/16"x9x1-5/8"
– Finished Ceiling –
Door
Spring
Header Wall
UP
Ceiling Mounting Holes
6" (15 cm) Maximum
Header
Bracket
Vertical
Centerline
of Garage Door Garage Door
Vertical Centerline
of Garage Door
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.
Lag Screw
5/16"-9x1-5/8"
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
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.
UP
Wall Mount
Optional
Mounting Holes
Lag Screws
5/16"x9x1-5/8"
Highest Point of
Garage Door Travel
Vertical
Centerline
of Garage Door
Header
Wall
Garage
Door
Door Spring
2x4
Structural
Support
Vertical
Centerline
of Garage Door
Header
Bracket
Horizontal
Line