Method to form metallic cages for reinforcement and relative device

Method to form metallic reinforcement cages for structures made of reinforced concrete, the metallic cages comprising longitudinal rods associated with transverse stirrups, at least partly shaped closed and distanced lengthwise, the method including:

• a step of distribution of the stirrups in number and in position as per design, within specific positioning and retaining means distanced lengthwise, said 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 inside the area defined by the stirrups and their axial positioning;
• 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 the method being characterised in that:
• said longitudinal positioning of the longitudinal rods comprises a step of positioning thereof on respective transverse arms, said transverse arms being longitudinally interposed between said means to position and retain the stirrups, and in that said method further comprises
• a step of relative displacement in height between said transverse arms and said means to position and retain the stirrups so as to position reciprocally said longitudinal rods and said stirrups at various heights according of the design of the cage to be formed.