| Inward-Turning One Piece DoorNote: these unusual doors do not protrude
 beyond the frame when opening
 Inward turning type garage doors are 
extremely rare but planning authorities occasionally insist this mechanism 
is fitted in cases where a garage door opens directly onto a busy 
thoroughfare because unlike conventional up & over doors, inward 
turning type garage doors don't swing out beyond the frame when opening. Inward turning doors
normally have a top mounted spring with wire cables supporting the door
at the sides, some examples have both horizontal and vertical 
tracks, some have counterbalance weights instead of springs.These doors
require extensive modification to make them suitable for automation, the options
are detailed below: |