Abstract: A method for end to end coupling prefabricated elements of reinforced concrete, for example so as to realize a column or pillar. The elements (A, B) have cavities (5) in their ends and are placed in alignment with their respective ends comprising the cavities the one against the other, the relative angular position of the elements being such that the reinforcement metallic rods (2a) projecting beyond the end of one of the elements are introduced into the cavities of another adjacent element, and reciprocally, and that the end of the rods (2a, 2b) are introduced with clearance in positioning sleeves (6) having an opening (6') usable for welding. Then the metallic rods put end to end are welded together, and the cavities are filled in with concrete or with another appropriate material.

Abstract: A composite bearing column comprises a solid metallic core of circular or polygonal section free from reentrant recesses. The core is embedded in an intermediate layer of mortar which is compatible both with metal and with concrete. An external concrete mass surrounds the intermediate layer. Metallic bars are longitudinally distributed around the central core in that concrete mass and extend lengthwise of the column parallel to the core. The bars are welded at their opposite ends to a base plate and to a head plate. In one embodiment, mounting rings are secured to the base and head plates and extend toward each other; and a metallic wire helically surrounds the bars.