Chamberlain LiftMaster Security+ 3265CM Manuel D'instructions 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
2x4 Support
Bracket
Optional
HORIZONTAL
Placement
AND VERTICAL
of Door
REINFORCEMENT
Bracket
IS NEEDED FOR
LIGHTWEIGHT
GARAGE DOORS
Vertical
(FIBERGLASS,
Centerline of
ALUMINUM, STEEL,
Garage Door
DOORS WITH GLASS
PANEL, ETC.). (NOT
PROVIDED)
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