■ STANDARD RADIUS
2″ TRACK
Headroom:
12″ Radius = 11-1/2″ Required
15″ Radius = 15-1/2″ Required
Sideroom:
4-1/2″ Required
Backroom:
Door Height + 23″ Required
3″ TRACK
Headroom:
16-1/2″ Required
Sideroom:
5-1/2″ Required
Backroom:
Door Height + 25″ Required
■ LOW HEADROOM FRONT MOUNT
2″ TRACK
Headroom:
12″ Required
Sideroom:
6″ Required
Backroom:
Door Height + 23″ Required
3″ TRACK
Headroom:
14-1/2″ Required
Sideroom:
6-1/2″ Required
Backroom:
Door Height + 25″ Required
(1,200 lb. limit on door weight)
■ LOW HEADROOM REAR MOUNT
2″ TRACK
Headroom:
7-1/2″ Required
Sideroom:
6″ Required
Backroom:
Door Height + 30″ Required
3″ TRACK
Headroom:
8-1/2″ Required
Sideroom:
6-1/2″ Required
Backroom:
Door Height + 32″ Required
(800 lb. limit on door weight)
■ VERTICAL LIFT
2″ TRACK
Headroom:
Door Height + 12″ Required
Sideroom:
4-1/2″ Required
Backroom:
23″ Required
3″ TRACK
Headroom:
Door Height + 12″ Required
Sideroom:
5-1/2″ Required
Backroom:
23″ Required
■ HIGH LIFT
2″ TRACK
High lift equals distance from top of door to bottom of horizontal track.
Maximum high lift equals headroom available minus 12″
Sideroom:
4-1/2″ Required
3″ TRACK
Maximum high lift equals headroom available minus 14″
Sideroom:
5-1/2″ Required
(Minimum high lift = 12″ Required)
■ ROOF PITCH
2″ TRACK
Headroom:
17″ Required
Sideroom:
4-1/2″ Required
Backroom:
Door Height + 23″ Required
3″ TRACK
Headroom:
18-1/2″ Required
Sideroom:
5-1/2″ Required
Backroom:
Door Height + 25″ Required
Headroom = Top of door to nearest obstruction (truss).
Dimensions listed cover the most common applications using standard hardware.
Note: Up to 4″ of additional headroom may be required for a trolley door opener.
