8. INSTALLATION STEPS

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.

8-1. MEASURE AND MARK DOOR AREA

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

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.

Fig. 10

See Fig. 12

See Fig. 11

 

 

Horizontal Line for

 

 

Header Bracket

Header

 

Height

 

 

 

 

 

Horizontal

Reinforcement

BracketVertical

Center Line

Door Width

Fig. 11

Lag Screw for Header installation

 

if necessary (not provided)

5/16 x 1-5/8”

 

Header Bracket

Lag Screw

Pilot Hole

 

Header

8

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Image 8
Genie M-4500, M-4700 owner manual Installation Steps, Measure and Mark Door Area, Install Header Bracket

M-4700, M-4500 specifications

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