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LIVE SHAFT REQUIREMENTS
Live Shaft doors are automated by the Model 3950 driving a chain which spans the drive sprocket and the door sprocket. The door
sprocket is attached to the door axle which spins the drums and rolls the door curtain. The assembly is held up by door brackets and the
door guides. (Figure 2)
Minimum Side Room
The minimum amount of side room depends on the mounting option for the Model 3950. For a standard wall mount or outside bracket
mount using the optional mounting bracket Model 3950MB, a minimum of 11" is required to the outside of the door opening. If inside
mounted, minimum of 3.75" clearance for "Wall" dimension is required. (Figure 3)
Minimum Shaft Length Past Door Bracket
A minimum of 1.5" of shaft is required (2.5" recommended) for mounting the door sprocket to the Live Door Shaft. (Figure 3)
Axle
Wall
Drum
Bracket
Door
Guide
Figure 2 - Live Shaft Components
Wall
2.5"
11"
Wall
Figure 3 - Live Shaft Clearances
2
Drum
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