Sheet-steel base structure for mounting a low-voltage electric switch cupboard has horizontal walls for base corner parts and drilled holes for leading through screws and nuts as retaining devices

摘要

Retaining/fixing devices like screws/nuts are fed through drilled holes (12,13,12',13') in first (18,24) and second (26,27) horizontal walls (HW) for first (10) and second (11) base corner parts. As a retaining/fixing device, a bush (14') has male/female threads and a radial flange (25') on one end to be braced against an HW by means of a nut after being fed through a hole in the base wall (18).