Install The Door Bracket; Sectional Doors - LiftMaster 87504-267 Manual De Instrucciones

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Installation

7 Install the Door Bracket

Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation
of door bracket. Contact the garage door manufacturer or installing dealer for opener reinforcement
instructions or reinforcement kit.
A horizontal and vertical reinforcement is needed for
lightweight garage doors (fiberglass, aluminum, steel, doors
with glass panel, etc.) (not provided). A horizontal
reinforcement brace should be long enough to be secured to
two or three vertical supports. A vertical reinforcement brace
should cover the height of the top panel. Contact the garage
door manufacturer or installing dealer for opener
reinforcement instructions or reinforcement kit.
NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and door arm. In this case
you will not need the door bracket; proceed to the next step.
SECTIONAL DOORS
1.
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.
2.
Position the top edge of the bracket 2"-4" (5-10 cm) below the top edge of the door, OR directly below any
structural support across the top of the door.
3.
Mark, drill holes and install as follows, depending on your door's construction:
Metal or light weight doors using a vertical angle iron brace between the door panel support
and the door bracket:
Drill 3/16" fastening holes. Secure the door bracket using the two self threading screws. (Figure 1)
Alternately, use two 5/16"-18x2" bolts, lock washers and nuts (not provided). (Figure 2)
Metal, insulated or light weight factory reinforced doors:
Drill 3/16" fastening holes. Secure the door bracket using the self-threading screws. (Figure 3)
Wood Doors:
Use top and bottom or side to side door bracket holes. Drill 5/16" holes through the door and secure
bracket with 5/16"-18 x 2" carriage bolts, lock washers and nuts (not provided). (Figure 4)
NOTE: The 1/4"-14 x 5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
Vertical Reinforcement
Vertical Centerline
of Garage Door
UP
Door Bracket
Self-Threading Screw
1/4"-14 x 5/8"
FIGURE 3
Vertical Centerline
of Garage Door
UP
Self-Threading
Screw
1/4"-14 x 5/8"
20
HARDWARE
Self-Threading Screw
1/4"-14 x
5/8"
FIGURE 2
Vertical Reinforcement
Bolt 5/16"-18 x 2"
(Not provided)
Door Bracket
Lock Washer 5/16"
Nut 5/16"-18
FIGURE 4
Bolt 5/16"-18 x 2"
(Not provided)
Inside Edge of Door or
Reinforcement Board
Vertical
Centerline of
Garage Door
Vertical
Centerline
of Garage Door
UP
UP

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