Chamberlain LiftMaster Security+ 1256R Owner's Manual page 25

ONE-PIECE D OORS
Please readandcomply withthewarnings a nd
reinforcement instructions o ntheprevious page.
Theyapplytoone-piece d oorsalso.
• Center t hedoorbracket o nthetopofthedoor,in
linewiththe header b racket a s shown. M arkeither
theleftandright,or thetopandbottom 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.
HARDWARE SHOWN
ACTUAL SIZE
Self-Threading Screw
1/4"- 14x5/8"
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
2x4 Support
--Finished Ceiling--
Door
Bracket
Optional
Placement
of Door
Bracket
Vertical
Centerline of
Garage Door
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
NOT PROVIDED)
r--r
Door
Bracket
_i Self-Threading
_- Screw
, 1/4"-14x5/8"
i
' Top of Door
(Inside
Garage)
of Door
Optional
Placement
For a door with no exposed framing,
or for the optional installation, use
lag screws 5/16"xl-1/2" (Not Provided)
to fasten door bracket.
METAL DOOR
Nut
5/16"-18
Door
Bracket
®
Lock Washer
, 5/16"
i
=
' Top of Door
(Inside
Garage)
Top Edge
of Door
Optional
Placement
Carriage Bolt
_ _ 5/16"x2"
(Not Provided)
WOOD DOOR
25