Genie M-4700 User Manual download pdf (Page 8)

See Fig. 12

See Fig. 11

Header

Door Width

Vertical

Center Line

Horizontal Line for

Header Bracket

Height

Horizontal

Reinforcement

Bracket

Fig. 10

Identify a sound structural support on header wall above

garage door for header bracket mounting. See Fig. 11. If

appropriate header does not exist, replace or install a new

support using a 2x4 or 2x6 board. Fasten it securely using lag

screws (not provided) to structural supports of garage.

Before starting your installation, the door and the header

above the door must be measured and marked. This way, the

appropriate brackets can be mounted at the correct locations

avoiding installation and operating difficulties later.

MARK VERTICAL CENTER LINE:

■ Measure door width, then locate the center point (Fig.10).

■ Mark a vertical line on the upper half of your door, on the

top edge of your door, and on the header, through the

center point.

MEASURE DOOR’S HIGHEST TRAVEL POINT:

(Review Figs. on p. 5 for details)

■ Open door to its highest travel point and measure from

the garage floor to the top of door.

■ Write down this distance.

FOR SECTIONAL DOORS AND ONE-PIECE

DOORS WITH HORIZONTAL TRACK:

Add 1-1/4" to the door travel height (measured above).

FOR ONE-PIECE DOORS WITHOUT TRACK:

Add 3-3/4" to the door travel height (measured above).

MARK HORIZONTAL LINE FOR HEADER

BRACKET LOCATION:

■ Close door and measure the required distance (determined

above) from the garage floor to the header.

■ Mark a horizontal line, intersecting the vertical center

line, on header. This is the position at which the bottom

of the header bracket should be installed.

■ In case of minimal clearance above the door, the header

bracket may be mounted to the ceiling. In this case,

extend the vertical center line onto the ceiling, and mark

a horizontal line on the ceiling no further than 4" from

the header wall. The header bracket should be mounted

no farther than this distance from the header wall.

8-2. INSTALL HEADER BRACKET

8-1. MEASURE AND MARK DOOR AREA

8. INSTALLATION STEPS

If the header bracket is not rigidly fastened to a sound

structural support on the header wall or ceiling, the

safety reverse system may not work and could cause

serious injury or death. DO NOT move or adjust springs

or garage door hardware, as these parts are under

extreme tension and could cause injury or death.

Lag Screw for Header installation

if necessary (not provided)

Header Bracket

5/16 x 1-5/8”

Lag Screw

Pilot Hole

Header

Fig. 11

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 31 32

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Genie M-4700 User Manual Page 8

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