Large aluminium sliding glass doors in Reigate RH2.
Three panels each panel about 3 m long and 1/2 m tall. The runners for the main door that is being used have become damaged, therefore will need to be replaced. As a result damaging the main wheel support rib on the track. The main door would need to be removed which is very heavy.
It will take three or four men to remove the door and lay it flat. How to remove and replace the damaged track is a much bigger issue. Because the damaged rib can only be pushed in along the track rather than from above it means that the whole track would need to be removed in order to replace the damaged rib of the track.