Door frame has long side pieces and upper cross bar with an additional side piece fitted on outside on long side pieces and connected by guide rails for subsequent vertical adjustment

摘要

The door frame comprises two long side pieces and an upper cross bar set in wall openings and provided with a door panel. An additional side piece is fitted on the outside on the long side pieces and is connected to the inner side piece by guide rails so that after installation the door frame can be adjusted vertically and infinitely with its inner side pieces on the outer side pieces which have been fixed.