Chamberlain 3130M 1/3 HP, 3240M 1/2 HP Fasten the Door Bracket, Figure, Figure, Figure 2A, Figure 2B, Wood Doors:, SECTIONAL DOORS

INSTALLATION STEP 12

Fasten the Door Bracket

Follow instructions which apply to your door type as illustrated below or on the following page.

Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation

of door bracket. Contact your door manufacturer for reinforcement kit.

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.

Figure 1 shows one piece of angle iron as the horizontal brace. For the vertical brace, 2 pieces of angle iron are used to create a U-shaped support. The best solution is to check with your garage door manufacturer for an opener installation door 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 Step 13.

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.

Header

Bracket

Door

Bracket

Location

Vertical

Centerline

of Garage

Door

HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC). (NOT PROVIDED)

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 1/4"-14x5/8" self-threading screws (Figure 2A).

•Alternately, use two 5/16" bolts, lock washers and nuts (not provided) (Figure 2B).

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"x2" carriage bolts, lock washers and nuts (not provided) (Figure 4).

NOTE: The 1/4"-14x5/8" self-threading screws are not intended for use on wood doors.

HARDWARE SHOWN ACTUAL SIZE

Self-Threading Screw 1/4"-14x5/8"

Figure 1

Vertical Reinforcement
	Vertical Centerline
	of Garage Door
		Vertical Reinforcement
	UP		Vertical
			Centerline
Door Bracket		Bolt	of Garage Door
Self-Threading		5/16"-18x2"
		(Not	UP
Screw 1/4"-14x5/8"
		Provided)
Figure 2A		Door
		Bracket
		Lock Washer 5/16" Nut
			5/16"-18
		Figure 2B
		Bolt 5/16"-18x2"	Inside Edge of
		(Not Provided)	Door or
			Reinforcement
			Board
	Vertical
	Centerline	Vertical	UP
	of Garage
		Centerline
	Door
		of Garage
	UP
		Door
	Self-Threading		Figure 4
	Screw
	1/4"-14x5/8"

Figure 3

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