Door structure for building e.g. house, has each screw comprising of right and left hand threads joined together via unthreaded shank, with right hand thread fastened to side panel frame and left hand thread fastened to swing door frame

摘要

Each screw (9) comprises of right and left hand threads connected together via unthreaded shank. The right hand thread is fastened to a side panel frame (7), while the left hand thread is fastened to a swing door frame (3). The screw used preferably has square or hexagonal cross section. An Independent claim is also included for a connecting bolt for a door structure.