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Window Lite
Glazed section with various types of glass or clear acrylic
to allow for light and visibility.
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Sections
Steel panels reinforced with stiles interconnected with hinges
and rollers.
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Bottom
Bracket
A structured support which provides for attachment of lifting
cables.
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Cable
Drum
Grooved drums on the torsion spring shaft that lifting cables
wind around when door is opening.
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Torsion
Springs
Provides the means to raise and lower the door via cable winding
on drums.
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Extension
Extends along both horizontal tracks
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Rear
Hanger Track
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Track
Provides a guide for section to raise or lower door.
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Track
Types:
Standard
Low Headroom
High Lift
Vertical Lift
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Track
Components:
Vertical Track: on either side
of opening.
Horizontal Track: attached to ceiling.
Radius: curved track |
Standard
Heights:
7 feet high - 4 sections high
8 feet high - 5 sections high |
Gauge = thickness of steel
Lower is better. 24-gauge is thicker than 25-gauge. |
