4. Mount header bracket.
• Set flange (where boom strap attaches to bracket)
on your vertical line (Fig. 1-23).
• Set bottom of bracket on your horizontal line.
(Fig. 1-24).
• Mark 2 hole positions.
• Drill two 5/32 inch holes.
• Attach bracket with 2 lag screws [30].
Header bracket must be fastened to garage
framing. Do Not fasten to drywall, particle board,
plaster or other such material.
It may be necessary to attach a board across the
wall studs above the door header, to serve as a
mounting plate for the header bracket, so the
bracket can be mounted at the proper location
and have sufficient support.
Trackless Doors
HIGHEST POINT OF TRAVEL
Fig. 1-22 Find distance “H”
Top of door
Centerline (“C”)
“H”
“H”
FOR TRACKLESS DOORS
2. Find center of door and header (Fig. 1-21).
• Close door.
• Measure door width.
– Mark a vertical line (“C”) in the center on
the inside door and header.
3. Find header bracket position.
• Raise door, watching top edge of door.
• Stop door when edge reaches highest point
of travel.
• Measure distance from top edge of door to
floor (distance “H”) (Fig.1-22).
– Add 6 inches to distance “H” (Fig.1-23).
• Draw horizontal line across line “C” at this height
on header.
Fig. 1-21 Find center of door
Centerline (“C”)
NOTE: Operator Will Not Operate twice as fast on a
one-piece door.
Fig. 1-24 Header bracket orientation
CAUTION
Lag Screw
[30]
13
OPEN ORANGE PARTS BAG
Fig. 1-23 Find header bracket position
Highest point of travel
+ 6
"
(horizontal line)
