Chamberlain Security+ 3245M Owner's Manual page 21

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
- Finished Ceiling -
Header
2x4
Bracket
Support
Door
Bracket
Optional
HORIZONTAL
Placement
AND VERTICAL
of Door
REINFORCEMENT
Bracket
IS NEEDED FOR
LIGHTWEIGHT
Vertical GARAGE DOORS
Centerline
(FIBERGLASS,
of Garage ALUMINUM,
Door
STEEL, 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
Door
Bracket
Nut
5/16"-18
Door
Bracket
21
ACTUAL SIZE
Self-Threading Screw
1/4"-14x5/8"
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