20ft Shipping Containers High Cube. The 20-foot high-cubated offshore container is made of corten steel. The ground is made of steel. The 20-foot high-cuboat offshore container has a tara weight of 3.220 kg and a maximum payload of 13.280 kg. This is a total gross weight of 13.280 kg. The 20-foot high-cube offshore container has the following dimensions on the exterior: 6.058 x 2.438 x 2.896 (length x width x height in mm) and interiors: 5.896 x 2.346 x 2.657 (length x width x height in mm). The door open measures 2.338 x 2.258 mm (width x height). The volume of the container is 36.80 m3.