Chamberlain 1270LMC - Manual (Page 21)

Horizontal and vertical
reinforcement is needed for
lightweight garage doors
(fiberglass, aluminum, steel,
door with glass panel, etc.).
Header Wall
Vertical
Centerline of
Garage Door
– Finished Ceiling –
Header
Bracket
Door
Bracket
2/4/92 - 4/7/92
2x4
Door
Bracket
Door Bracket
Plate
Inside Edge
of Door or
Reinforcement Board
All ONE-PIECE Door Installation Procedure
• Center the bracket (with or without the plate
according to your fastening requirements) on the
inside face of the door, in line with the header
bracket as shown. Mark either the left and right, or
the top and bottom holes.
• Drill 5/16" pilot holes and fasten the door bracket
with hardware supplied.
21
Please read and comply with the warnings and reinforcement instructions on page 20.
They apply to one-piece doors also.
Carriage Bolt
5/16"-18x2-1/2"
Nut 5/16"-18 Lock Washer 5/16"
Hardware Shown Actual Size