The invention relates to a floating structure and to a method for obtaining same. The structure provides a first plurality of tubes (1) and a second plurality of tubes (2). The second plurality of tubes (2) is inserted into the first plurality of tubes (1), such as to extend through the upper portion of same, and both sets of tubes are welded together. The ends of the tubes of the first plurality of tubes (1), as per the example, are closed in order to be used as flotation tanks when the floating structure is fitted out for the use thereof. According to the method, the first plurality of tubes (1) is locked in place on the frame (7), with the pairs of holes (4, 4') provided in the tubes (1) of the first plurality of tubes (1) being aligned, and a corresponding tube (2) of the second plurality of tubes (2) is inserted through each pair of aligned holes by force, the ends of each of the connection portions or parts (3) contained in the tubes (1) being welded on the periphery of the holes (4, 4').
