Abstract: A device forms metallic cages for structures made of reinforced concrete, the metallic cages providing longitudinal rods associated with transverse stirrups, the transverse stirrups having an at least partly closed shape and being distanced lengthwise. The device includes a supporting frame, and a plurality of housing seatings arranged in a longitudinal line on the supporting frame at least according to a desired interaxis (“i”) or a multiple of the interaxis (“i”), each of the housing seatings cooperating with a relative means to position and retain the stirrups defining their erect position on a substantially vertical plane. A plurality of transverse arms to support the longitudinal rods lie separated from each other on a horizontal plane, the transverse arms being interposed between the housing seatings. Means are provided for relative displacement in height between the transverse arms and the means to position and retain the stirrups.

Abstract: A method for forming metallic reinforcement cages for reinforced concrete includes a step of distribution of the stirrups within specific positioning and retaining means distanced lengthwise, the positioning and retaining means cooperating at least with a portion of the stirrups to clamp them in an erect position on a substantially vertical plane, a step of longitudinal positioning of the longitudinal rods on respective transverse arms, the transverse arms being longitudinally interposed between the means to position and retain the stirrups, a step of reciprocal connection of the longitudinal rods and the stirrups, a step of release of the cage from the positioning and retaining means, and a step of relative displacement in height between the transverse arms and the means to position and retain the stirrups so as to position reciprocally the longitudinal rods and the stirrups at various heights according of the design of the cage to be formed.