LiftMaster SECURITY+ 3245CM 1/3 HP Manuel Du Propriétaire page 20

ONE-PIECE DOORS
Please read and comply with the warnings and
reinforcement instructions on the previous page. They
apply to one-piece doors also.
• Center the door bracket on the top of the door, in line
with the header bracket as shown. Mark either the left
and right, or the top and bottom holes.
• Metal Doors: Drill 3/16" pilot holes and fasten the
bracket with the 1/4"-14x5/8" self-threading screws
provided.
• Wood Doors: Drill 5/16" holes and use 5/16"x2"
carriage bolts, lock washers and nuts (not provided) or
5/16"x1-1/2" lag screws (not provided) depending on
your installation needs.
NOTE: The door bracket may be installed on the top edge
of the door if required for your installation. (Refer to the
dotted line optional placement drawing.)
Header
Wall
Door Bracket
— Finished Ceiling —
Header
Bracket
2x4 Support
Optional
HORIZONTAL AND VERTICAL
Placement of
REINFORCEMENT IS NEEDED
Door Bracket
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
Vertical
(NOT PROVIDED)
Centerline of
Garage Door
For a door with no exposed framing,
or for the optional installation, use lag
screws 5/16"x1-1/2" (Not Provided)
to fasten door bracket.
HARDWARE SHOWN
Self-Threading Screw
1/4"-14x5/8"
Door
Bracket
Nut
5/16"-18
Door
Bracket
20
ACTUAL SIZE
Self-Threading
Screw 1/4"-14x5/8
Top of Door
(Inside Garage)
Top Edge
of Door
Optional
Placement
METAL DOOR
Lock Washer
5/16"
Top of Door
(Inside Garage)
Top Edge
of Door
Optional
Placement
Carriage Bolt
5/16"x2"
(Not Provided)
WOOD DOOR