A transportation system for transportation of large items in the form of flanges, wherein said transportation system comprises: a frame having an extension in a longitudinal direction, in a transversal direction and in a vertical direction; wherein said frame comprises two longitudinal girders (6,6'), which are connected to a one or more pairs of primary support beams (8,8', 10,10'); wherein said primary support beams are being arranged on an upper part of said longitudinal girders (6,6'); wherein said longitudinal girders comprise a lower surface and an upper surface; wherein said transversal primary support beams comprise an upper surface; wherein the area between two transversal primary support beams defines a storage area for said large items in the form of flanges; wherein free access in a downward direction, all the way down to the height of the lower surface of the longitudinal girders, is provided for said flanges in the storage area for the large items in the form of flanges; wherein the lower part of the frame is having dimensions and locking mechanisms corresponding to a freight container; thereby allowing the transportation system to be arranged and locked in place safely on top of a freight container; characterized in that the frame comprises a number of pairs of brackets for accommodating secondary support beams; and that each bracket is being arranged opposite to another on its respective longitudinal girder (6,6') at a position in a longitudinal direction, corresponding to said storage area for the large items in the form of flanges; and that each bracket comprises a number of cavities which are being arranged in a longitudinal direction for accommodating an end of a secondary support beam; and that the number of pairs of brackets is being 2 or more in respect of each storage area for the large items in the form of flanges; and that said transportation system furthermore comprising one or more pairs of secondary support beams; thereby allowing storage and transportation of two sizes of flanges in such a way that the larger flanges are resting on a pair of primary support beams, and the smaller flanges being arranged within the larger flanges, wherein the smaller flanges are resting on a pair of these secondary support beams. a frame having an extension in a longitudinal direction, in a transversal direction and in a vertical direction; wherein said frame comprises two longitudinal girders (6,6'), which are connected to a one or more pairs of primary support beams (8,8', 10,10'); wherein said primary support beams are being arranged on an upper part of said longitudinal girders (6,6'); wherein said longitudinal girders comprise a lower surface and an upper surface; wherein said transversal primary support beams comprise an upper surface; wherein the area between two transversal primary support beams defines a storage area for said large items in the form of flanges; wherein free access in a downward direction, all the way down to the height of the lower surface of the longitudinal girders, is provided for said flanges in the storage area for the large items in the form of flanges; wherein the lower part of the frame is having dimensions and locking mechanisms corresponding to a freight container; thereby allowing the transportation system to be arranged and locked in place safely on top of a freight container; characterized in that the frame comprises a number of pairs of brackets for accommodating secondary support beams; and that each bracket is being arranged opposite to another on its respective longitudinal girder (6,6') at a position in a longitudinal direction, corresponding to said storage area for the large items in the form of flanges; and that each bracket comprises a number of cavities which are being arranged in a longitudinal direction for accommodating an end of a secondary support beam; and that the number of pairs of brackets is being 2 or more in respect of each storage area for the large items in the form of flanges; and that said transportation system furthermore comprising one or more pairs of secondary support beams; thereby allowing storage and transportation of two sizes of flanges in such a way that the larger flanges are resting on a pair of primary support beams, and the smaller flanges being arranged within the larger flanges, wherein the smaller flanges are resting on a pair of these secondary support beams.