UM – spring tubes are fitted under the horizontal tracks. The most compact version.


Headroom:
       Standard -110 mm (manual operation), 140 mm (electric operation)
       With top weather seal on lintel – 80 mm (manual operation), 120 mm (electric operation)
       With top weather seal on lintel and LHR brackets – 70 mm (manual operation), 110 mm (electric operation)
N.B. the bottom of spring tubes are at H-162 mm above floor level. It is important if there are doors or windows on garage side walls.

SM – spring tubes are fitted on the external side of horizontal tracks.


Headroom:
       Standard – 110 mm (manual operation), 140 mm (electric operation)
       With top weather seal on lintel – 80 mm (manual operation), 120 mm (electric operation)
       With top weather seal on lintel and LHR brackets – 70 mm (manual operation), 110 mm (electric operation)
N.B. Min required sideroom 75 mm for fitting on the wall and 150 mm for spring tube at 300 mm behind the door reveal (see drawing below).

TM – spring tubes are fitted above horizontal tracks.
Min required headroom of 180 mm for manual and electric operation.