LiftMaster 1355 1355 Manual - Page 17

Installation Step 5

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INSTALLATION STEP 5 Hang the Opener Two representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the opener. This bracket and fastening hardware are not provided. 1. Measure the distance from each side of the motor unit to the structural support. 2. Cut both pieces of the hanging bracket to required lengths. 3. Drill 3/16" pilot holes in the structural supports. 4. Attach one end of each bracket to a support with 5/16"-18x1-7/8" lag screws. 5. Fasten the opener to the hanging brackets with 5/16"-18x7/8" hex bolts, lock washers and nuts. 6. Check to make sure the rail is centered over the door (or in line with the header bracket if the bracket is not centered above the door). 7. Remove the 2x4. Operate the door manually. If the door hits the rail, raise the header bracket. 8. Grease the top and underside of the rail surface where the trolley slides with rail grease. HARDWARE SHOWN ACTUAL SIZE WARNING To avoid possible SERIOUS INJURY from a falling CAUTION garage door opener, fasten it SECURELY to structural supports of the garage. Concrete anchors MUST be used if installing any brackets into masonry. Figure 1 Structural Supports Measure Distance Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 Lag Screws 5/16"-18x1-7/8" Figure 2 Bracket (Not Provided) Hidden Support Lag Screws 5/16"-18x1-7/8" FINISHED CEILING Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 (Not Provided) Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 Lag Screw 5/16"-9x1-5/8" Hex Bolt 5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16" Figure 3 Lag Screws 5/16"-18x1-7/8" Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 FINISHED CEILING (Not Provided) Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 17

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17
INSTALLATION STEP 5
Hang the Opener
Two representative installations are shown. Yours
may be different. Hanging brackets should be angled
(Figure 1) to provide rigid support. On finished
ceilings (Figure 2 and Figure 3), attach a sturdy
metal bracket to structural supports before installing
the opener. This bracket and fastening hardware are
not provided.
1. Measure the distance from each side of the motor
unit to the structural support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex bolts, lock washers and nuts.
6. Check to make sure the rail is
centered over the door (or in line
with the header bracket if the bracket is not
centered above the door).
7.Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface
where the trolley slides with rail grease.
To avoid possible SERIOUS INJURY from a falling
garage door opener, fasten it SECURELY to structural
supports of the garage. Concrete anchors MUST be used
if installing any brackets into masonry.
Hex Bolt
5/16"-1
8
x7/
8
"
Nu
t 5/16"-1
8
Lock
W
asher 5/16"
Lag Scre
w
5/16"-9x1-5/
8
"
HARDWARE SHOWN ACTUAL SIZE
Meas
u
re
Distance
Lag Scre
w
s
5/16"-1
8
x1-7/
8
"
Bolt 5/16"-1
8
x7/
8
"
Lock
W
asher 5/16"
Nu
t 5/16"-1
8
Str
u
ct
u
ral
S
u
pports
Bracket
(
N
ot Pro
v
ided)
Lag Scre
w
s
5/16"-1
8
x1-7/
8
"
(
N
ot Pro
v
ided)
Bolt 5/16"-1
8
x7/
8
"
Lock
W
asher 5/16"
Nu
t 5/16"-1
8
FINISHED CEILING
Hidden
S
u
pport
Bolt 5/16"-1
8
x7/
8
"
Lock
W
asher 5/16"
Nu
t 5/16"-1
8
Bolt 5/16"-1
8
x7/
8
"
Lock
W
asher 5/16"
Nu
t 5/16"-1
8
Lag Scre
w
s
5/16"-1
8
x1-7/
8
"
(
N
ot Pro
v
ided)
Bolt 5/16"-1
8
x7/
8
"
Lock
W
asher 5/16"
Nu
t 5/16"-1
8
FINISHED CEILING
Figure 1
Figure 2
WARNING
Figure 3