Abstract: A coupling head for structure sections of prestressed concrete comprises a body for anchorage of the strand ends relating to a first cast structure section and a plate blockable on the body for anchorage of the strand ends relating to a structure section to be subsequently cast; these second ends are enclosed within a perimeter defined by said first mentioned ends.

Abstract: Device for anchoring tensioning elements, such as strands, bundles of metal strands or cables with metal or concrete structures, comprising one or more tensioning elements, a plate for load distribution, the plate being perforated for the passage of said tensioning elements, and clamping means for each of the tensioning elements, according to which there are further provided: a box for receiving all said tensioning elements so as not to contact the box walls, the box being provided with opposite openings of a sufficient size to allow the passage of said tensioning elements; a plurality of tubes of sufficient inner size to accommodate with clearance each of the tensioning elements; a packing of epoxy resin in said tubes and said box about said tensioning elements. Provision is also made for adjustment of the strain by means of a ring nut, as well as interchangeability of the tensioning elements.