Adjustments to the number of turns stated may be necessary. If door rises off floor under
spring tension alone, reduce spring tension until door rests on the floor. If the door is hard to
rise or drifts down on its own, add spring tension.
NOTE:
An unbalanced door such as this can cause garage door opener operation problems.
WARNING
DO NOT OPEN DOOR UNTIL STEP REAR BACK HANGS IS COMPLETED.
Attaching Rear Back Hangs
28
IMPORTANT:
HOLD THE DOOR DOWN TO PREVENT IT FROM RISING UNEXPECTEDLY IN THE
EVENT THE SPRING(S) WERE OVER-WOUND AND CAUTIOUSLY REMOVE LOCKING PLIERS
FROM VERTICAL TRACKS.
Raise the door until the top section and half of the next section are in the horizontal track
radius. Do not raise door any further since rear of horizontal tracks are not yet supported.
WARNING
RAISING DOOR INTO THE LOOSE HORIZONTAL TRACKS CAN RESULT IN
DOOR FALLING AND CAUSE SEVERE OR FATAL INJURY.
Clamp a pair of locking pliers onto the vertical tracks just above the second track roller on
one side, and just below the second track roller on the other side. This will prevent the door
from raising or lowering while installing the rear back hangs.
Using the chart below, select the appropriate perforated angle (may not be supplied). Fabri-
cate and install rear back hangs, as shown.
Perforated Angle Gauge Weight Limitations:
Perforated Angle Gauge
Door Balance Weight
2” x 2” x 12 Gauge
Less Than 800 lbs.
1-1/4” x 1-1/4” x 13 Gauge
Less Than 305 lbs.
1-1/4” x 1-1/4” x 15 Gauge
Less Than 220 lbs.
1-1/4” x 1-1/4” x 16 Gauge
Less Than 175 lbs.
NOTE:
If an opener is installed, position horizontal tracks one hole above level when securing
it to the rear back hangs.
WARNING
MAKE SURE BACK HANGS ARE BRACED SUFFICIENTLY TO RESIST ANY
MOTION DURING SPRING APPLICATION AND DOOR TRAVEL. IF BACK
HANGS PIVOT OR DEFLECT, ADD REINFORCEMENT UNTIL THEY REMAIN
FIRM AND STATIONARY. ANY BACK HANG THAT IS BENT MUST BE
REPLACED.
WARNING
KEEP HORIZONTAL TRACKS PARALLEL AND WITHIN 3/4” TO 7/8” FROM
DOOR EDGE, OTHERWISE DOOR COULD FALL, RESULTING IN SEVERE OR
FATAL INJURY.
NOTE:
Doors heights over 8’0” or door widths over 11’0”, require an additional set of rear
center back hangs to be installed and located at the middle of the horizontal tracks, see
breakdown of parts.
Based on your door width and door heights and using perforated angle (may not be supplied),
(2) 5/16” x 1-5/8” hex head lag screws and (3) 5/16” bolts with nuts (may not be supplied),
fabricate rear center back hangs for the horizontal tracks, for the following:
FOR ITEM J2, (SEE BREAKDOWN OF PARTS):
The Rear Center Back Hang Assemblies are
to be used for all doors over 11’0” door height and over 14’0” door width. One Rear Center
Back Hang Assembly, per side.
FOR ITEM J3, (SEE BREAKDOWN OF PARTS):
The Rear Center Back Hang Assemblies are
to be used for all doors over 16’0” door height. Two Rear Center Back Hang Assemblies, per
side.
Measure and drill a 3/8” diameter hole through the center length of the horizontal track, as
shown. Attach the rear center back hangs to the horizontal tracks with (1) 3/8” Truss head
bolt and (1) 3/8” nut (may not be supplied).
IMPORTANT:
DO NOT SUPPORT THE WEIGHT OF THE DOOR ON ANY PART OF THE REAR
BACK HANGS THAT CANTILEVERS 4” OR MORE BEYOND A SOUND FRAMING MEMBER.
NOTE:
If rear back hangs are to be installed over drywall, use (2) 5/16” x 2” hex head lag
screws and make sure lag screws engage into solid structural lumber.
WARNING
FAILURE TO ASSEMBLE AND ATTACH REAR BACK HANGS PROPERLY
ACCORDING TO THE ABOVE INSTRUCTIONS MAY RESULT IN DOOR
FALLING WHEN RAISED, CAUSING SEVERE OR FATAL INJURY.
NOTE:
Perforated angle must be attached to sound framing members and
nails should not
be used
.
90°
(3) 5/16”
Bolts and nuts
(3) 5/16” Bolts and
(3) 5/16” nuts
Perforated
angle
5/16” Hex nut
5/16”-18 x 1-1/4”
Hex bolt
Perforated angle bolted
using (2) 5/16” x 1-5/8”
hex head lag screws to
ceiling member and
parallel to door
Horizontal track
NOTE:
Repeat the same
process for right hand side.
Horizontal tracks
Door edges
3/4” To 7/8”
3/4” To 7/8”
Center back
hang
Horizontal
track
(1) 3/8” Truss head bolt
(may not be supplied)
Center of the horizontal track
Drill 3/8”
diameter hole
Horizontal
track
(1) 3/8” Nut
(may not be supplied)
Cable Keepers
29
13
