Live Shaft Door Requirements - LiftMaster LJ8950W Manuel

Installation

Live Shaft Door Requirements

For live shaft door installations the door sprocket is attached to the door axle which spins
the drums and rolls the door curtain.
MINIMUM SIDE CLEARANCE
A minimum of 11" (27.9 cm) clearance on the outside of the door opening is required
for standard wall mounting or outside mounting using the optional mounting bracket
Model 3950MB.
A minimum of 3.75" (9.5 cm) clearance on the outside of the door opening is required for
inside mounting using the optional mounting bracket Model 3950MB.
MINIMUM SHAFT LENGTH
The door shaft must extend past the drum bracket a minimum of 1.5" (3.8 cm) (2.5"
[6.3 cm] recommended) for installing the door sprocket.
Drum Door
2.5" (6.3 cm)
Door Shaft
Drum Bracket
Door Guide
11" (27.9 cm) Min. Clearance
Outside Mounting
3.75" (9.5 cm) Min. Clearance
Inside Mounting
7