Abstract: A composite structure has a rod (1) and a collar (2) locked on the rod (1) and composed of two semicollars (12, 22), each extending over an angle smaller than 180.degree. and having lateral longitudinal flanges (12', 12", and 22', 22"), whereat they are linked to each other by clamping bolts (3', 3"). The flanges (12', 22') on one side of the semicollars (12, 22) adhere to each other with their facing plane surfaces (212', 222'), whereas the facing plane surfaces (212", 222") of the flanges (12", 22") on the opposite side of the semicollar (12, 22) are spaced. The rod (1) has at least one outer positioning projection (6', 6"), which is engaged in a corresponding inner positioning recess of the collar (2).

Abstract: An overhead electrification plant for railway lines, or similar, comprises at least one electric wire (9), the so-called contact wire, to power an engine, extending in a predetermined position along the railway line, and being held up by a plurality of suspension elements (3) arranged at predetermined intervals. The suspension elements (3) are at least partially composed of complex metal structures (4, 6, 7, 8) in the form of a polygon, and supported by fixed lateral standards (1) so as to project therefrom. In at least some sections of the track (B), the suspensions have equal and constant geometries, i.e. the suspension elements (3) are similar in the geometrical sense, whereas the only variable is the different overall transverse extension of the suspension elements (3) in the different points of the railway track (B).