Craftsman 139.53920D Owner's Manual page 5

Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
o 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,
o Depending on your door's construction, you may
need additional mounting hardware for the door
bracket (Step 11)_
Without a propedyworking safety reversalsystem,
persons (particularlysmall children) could be
SERIOUSLY iNJUREDor KILLEDby a closing garage
door
• Thegap betweenthe bottom of the garagedoor and
the floor MUSTNOTexceed1/4" (6 ram) OtherMse,
the safety reversalsystem may not work properly
• Thefloor or the garage door MUST be repairedto
eliminatethe gap
ONE-PIECE DOOR WITHOUT TRACK
_ Header Wall
FINISHED CEILING
Support bracket
& fastening
hardwaze is required
See page 16
Rail
Slack in chain tension \
is aorta!! when
garage door is closed Meier Unit
Safety Reversing Sensor
Access
Door
O
Safety Reveming
Gap between floor Sensor
and bottom of door must not exceed I14 _ {6 ram)
ONE-PIECE DOOR WITH TRACK
[
_afety
Reversing Sensor
Access
Door Of
Reversing
Gap between floor Seesor
and bottom Of deer
must not exceed I/4" (6 ram)
CLOSED POSITION
r.-'/._ Trottey Stop Boll Cable
Chain
Door