Abstract: A cabinet structure for housing electric or electronic equipments, has a front cabinet, a rear column whose height can be varied according to that of the front cabinet, structure fittings including a telescoping head to be superimposed to the column, a plurality of telescoping grid bottom plates, to be placed between two C-shaped profiles of a raceway for connecting the front cabinet to the rear column, together with a T-shaped crossbeam. The telescoping head and the grid bottom plates when in the telescoped position fit in their width to the width of the front cabinet which can range between a simple width for cabinet structures to be installed near a wall and a double width for cabinet structures to be installed in the middle of a room.