5
Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
• Generally, a one-piece door does not require
reinforcement. If your door is lightweight, refer to
the information relating to sectional doors in
Installation Step 11.
• Depending on your door’s construction, you may
need additional mounting hardware for the door
bracket (Step 11).
Safety
Reversing Sensor
F
IN
IS
H
E
D
C
E
ILIN
G
S
up
port bracke
t
&
faste
nin
g
hardw
are is re
quired
.
S
ee pa
ge 17
.
Slack in Chain Tension
is Normal When
Garage Door is Closed
Safety
Reversing Sensor
Header
Wall
Access
Door
Gap between floor and bottom
of door must not exceed 1/4".
M
o
tor U
nit
W
all-m
ounted
D
oor
C
ontrol
ONE-PIECE DOOR WITHOUT TRACK
CLOSED POSITION
Cable
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
Cable
T-rail
Garage
Door
Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
• The gap between the bottom of the garage door and
the floor MUST NOT exceed 1/4" (6 mm). Otherwise,
the safety reversal system may not work properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
CLOSED POSITION
Access
Door
Gap between floor
and bottom of door
must not exceed 1/4"
Safety
Reversing
Sensor
Safety
Reversing
Sensor
Wall-
Mounted
Door
Control
Cable
Pulley Bracket
Door
Bracket
Straight
Door
Arm
Trolley
Header
Wall
T-rail
Garage
Door
Cable
Emergency Release
Rope & Handle
Chain
Header
Bracket
Curved
Door Arm
ONE-PIECE DOOR WITH TRACK
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