products is designed in order to be able to absorb stresses from the tower on the tank shell with a desired degree of flexibility preferably in the tower foot e g in a zone thereof and or as a flexible element application_number US 59634496 A description as illustrated in fig1 between a tank 2 and a vertically extending tower 3 a flexible transition section 1 is provided the flexibility is principally provided by a double curved annular or continuous peripheral element 4 shown by quarter circles a a 39 this peripheral element 4 is connected to the tower 3 via a connecting element 5 illustrated by line a 39 b which can however be omitted if this is considered expedient alternatively the peripheral element 4 can be designed as a number of single curved plates which are welded to the connecting element 5 at point a 39 and the tank wall at point a thus in this case the peripheral element 4 will be discontinuous in the first embodiment of the device according to the invention which is illustrated on the left side of the tower 39 s longitudinal axis 8 the connecting element 5 is composed of a flat plate but it can be conical instead in the second embodiment of the device according to the invention which is illustrated on the right side of the tower 39 s longitudinal axis 8 the connecting element 5 is composed of a part of a spherical surface and in this case the entire construction is in the form of a korbogen structure.