Craftsman 139.18452D Manuel D'instructions page 23

INSTALLATION STEP 11
Fasten the Door Bracket
Follow instructions which apply to your door type
as illustrated below or on the following page.
A horizontal reinforcement brace should be long
enough to be secured to two vertical supports. A
vertical reinforcement brace should cover the height
of the top panel.
The illustration shows one piece of angle iron as the
horizontal brace. For the vertical brace, two pieces of
angle iron are used to create a U-shaped support
(Figure 1). The best solution is to check with your garage
door manufacturer for an opener installation door
reinforcement kit.
NOTE: Many vertical brace installations provide for direct
attachment of the clevis pin and door arm. In this case
you will not need the door bracket; proceed to Installation
Step 12.
SECTIONAL DOORS
• Center the door bracket on the previously marked
vertical centerline used for the header bracket
installation. Note correct UP placement, as stamped
inside the bracket (Figure 2).
• Position the bracket on the face of the door within the
following limits:
A) The top edge of the bracket 2"-4" (5-10 cm) below
the top edge of the door.
B) The top edge of the bracket directly below any
structural support across the top of the door.
Header Bracket
Door
Bracket
Location
Vertical
Centerline
of Garage
Door
WARNING
CAUTION
Fiberglass, aluminum or lightweight steel garage doors WILL
REQUIRE reinforcement BEFORE installation of door bracket.
Contact your door manufacturer for reinforcement kit.
HARDWARE SHOWN ACTUAL SIZE
Nut 5/16"-18
• Mark and drill 5/16" left and right fastening holes.
Secure the bracket as shown in Figure 1 if there is
vertical reinforcement.
If your installation doesn't require vertical reinforcement
but does need top and bottom fastening holes for the
door bracket, fasten as shown in Figure 2.
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, aluminum, steel, doors with
glass panel, etc.). (Not Provided)
Carriage Bolt
Inside Edge
5/16"-18x2-1/2"
of Door or
Reinforcement Board
UP
Door Bracket
Figure 2
23
Lock Washer 5/16"
Carriage Bolt
5/16"-18x2-1/2"
Vertical
Reinforcement
Vertical
Centerline
of Garage
Door
Door
Bracket
Lock Washer
5/16"
Nut
5/16"-18
Figure 1
UP