Fasten Door Bracket(Sectional D Oor) - Craftsman 139.53974SRT Owner's Manual

Garage door opener 1/2 hp
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Installation Step 11
Fasten Door Bracket
Follow Instructions which apply to your door
type as Illustrated below or on page 25.
A horizontal brace should be long enough to be secured to 2 vertical supports. A vertical 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, 2 pieces of
angle iron are used to create s "U"-shaped support. The best solution Is to check with your garage door
manufacturer for an opener installation door reinforcement klL
• Center the door bracket on the previously marked
_
_..._._.,
_'_'/
vertical guideline used for the header bracket
installation. Note the correct LIPplacement, as
stamped Inside the bracket.
• Positionthe bracket on the face of the door within
the following limits:
A) The top edge of the bracket 2"-4" below the top
edge of the door.
B) The top edge of the bracket directly below any
structuralsupport across the top of the door.
• Mark and ddll 5/16" left and right fastening holes,
Secure the bracket as shown in Figure t if there is
vertical reinforcement.
If your installationdoesn't requirevertical reinforce-
ment but does need top and bottomfastening holes
for the door bracket, fasten as shown in Figure 2.
Hardware Shown Actual Size
©
©
Nut _16"-18
LockWasher
5/16 °
S/16"-18
x 2-I/2"
24

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