Install The Header Bracket; Wall Header Bracket Installation; Ceiling Header Bracket Installation - LiftMaster MERIK SECURITY+ 790LMK Manual Del Propietário

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 5 mm 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 15 cm
from the wall. Make sure the arrow is pointing toward the wall.
The bracket can be mounted fl ush against the ceiling when
clearance is minimal.
• Mark the side holes. Drill 5 mm pilot holes and fasten bracket
securely to a structural support with the hardware provided.
Lag Screws
5/16"x9x1-5/8"
Ceiling Mounting Holes
Optional
Wall Mounting Holes
Header
Bracket
38 mm
Board
Highest Point of
Garage Door Travel
15 cm Maximum
Door
Spring
Garage Door
18
Wall Mounting Holes
Vertical
Centerline of
Garage Door
Lag Screws
5/16"-9x1-5/8"
Door Spring
Vertical Centerline
of Garage Door
Finished Ceiling
Vertical Centerline
Header
of Garage Door
Bracket
Lag Screws
5/16"-9x1-5/8"
Header Wall
Vertical
Centerline of
Garage Door