Abstract: This relates to a bridge stay formed by a cable (1) which itself is surrounded by a discontinuous sheath composed of identical successive tubular sections (4) having ends which fit together (at 9). This stay comprises an inextensible cablet (10) pulled taut along the cable, on the inside of the successive sheath sections, which cablet is fastened by equidistant fasteners (11), the number of fasteners being equal to that of the sheath sections, each fastener being fixed to a sheath section at a point on this section and the distance (D) between any two successive fasteners fastened to the cablet being equal to the distance between two identical points on two successive sheath sections, which distance is slightly less than the minimum distance envisageable for each section.

Abstract: To mount a multiple strand stay of a stayed bridge between a tower and a deck of said bridge, one of the strands (4.sub.1) that is to make up the stay is installed in its final oblique position; a guide cage is suspended from said strand installed in this way, the cage being constituted by a sequence of rigid hoops (5) that are interconnected by strings (6), said cage surrounding said first strand and also surrounding a traction cable (9); said cable is used to pull successive strands (4) up inside the cage; after each strand has been pulled up, it is put under tension so that it bears laterally against the already installed strands, and its ends are anchored respectively to the tower and to the deck; and after all of the strands have been installed, the guide cage is removed from the completed stay.