Chamberlain 9902 - Manual (Page 25)

Horizontal and vertical
reinforcement is needed for
lightweight garage doors
(fiberglass, aluminum, steel,
door with glass panel, etc.).
(Not Provided)
Header Wall
Vertical
Centerline of
Garage Door
Finished Ceiling
Optional
Placement
of Door
Bracket
Header
Bracket
Door
Bracket
2x4 Support
For a door with no
exposed framing or for
the optional installation,
use 5/16"x1-1/2" lag
screws (not provided)
to fasten door bracket.
Door
Bracket
Top of Door
(Inside Garage)
Carriage Bolt
5/16"-18x2-1/2"
Optional
Placement
Lock Washer
5/16"
Nut
5/16"-18
Top Edge
of Door
All ONE-PIECE Door Installation Procedure
• Center the bracket on the top of the door, in line with
the header bracket as shown. Mark holes.
• Drill 5/16" pilot holes and fasten the door bracket with
hardware provided.
If the door has no exposed framing, drill 3/16" pilot holes
and fasten the bracket with 5/16"x1-1/2" lag screws (not
provided) to the top of the door.
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.) Drill 3/16"
pilot holes and substitute 5/16"x1-1/2" lag screws (not
provided) to fasten the bracket to the door.
25
Please read and comply with the warnings and reinforcement instructions on page 24. They apply
to one-piece doors also.
Carriage Bolt
5/16"-18 x 2-1/2"
Nut 5/16" - 18 Lockwasher 5/16"
Hardware Shown Actual Size