The bottom plate anchors the lifting cable to the bottom panel of the door. It carries the full lifting load, so it is the last place you want a fatigued part.
Signs it needs replacing
Distortion around the cable anchor
Cable slipping at the bottom of the door
Sizes and variants
Variant
Specification
Left hand
Right hand
Fitting notes
Under tension whenever the door is closed. Never unbolted before the springs have been wound down.