Abstract of EP1142509 Support has two mounting columns between which one or more compartment bases (4,5,6) are mounted. Each base (4,5,6) has a concave flange (8), the side edges or wings (9) of which have a width (a) that is slightly less than the width (b) between corresponding contact surfaces (10) of the column. The flange has upper and lower bolt holes for fastening bolts that secure the flange against the column.