Chamberlain 248735S 3/4 HP Garage Door Opener User Manual


 
24
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.)
HARDWARE SHOWN
ACTUAL SIZE
Self-Threading Screw
1/4"-14x5/8"
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
Vertical
Centerline of
Garage Door
Optional
Placement
of Door
Bracket
Door
Bracket
Header
Bracket
Header Wall
2x4 Support
— Finished Ceiling —
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.
Door
Bracket
Self-Threading
Screw 1/4"-14x5/8"
Top of Door
(Inside Garage)
Top Edge
of Door
Optional
Placement
Nut
5/16"-18
Lock
Washer
5/16"
Top of Door
(Inside Garage)
Top Edge
of Door
Optional
Placement
Carriage Bolt
5/16"x2"
(Not Provided)
Door
Bracket
WOOD DOOR
METAL DOOR