Using only hot rolled, weldable quality reinforcing bar to SABS 920, the main bars are positioned into a pre-drilled backing plate on the CageWeld machine to ensure the correct centres of the bars around the cage. Numerous plates are available to provide almost limitless combinations of spacings and bar sizes. As the backing plate moves away from the starting point, the binder is fed onto the revolving cage. The speed of the revolution of the cage and the speed at which the backing plate withdraws is computercontrolled to ensure the correct pitch of the spiral to the main cage bars. The spiral is welded to the cage, ensuring a rigid and robust reinforcing cage ready to be delivered to site as required.
Where necessary, for large diameter and heavy cages, additional stiffeners can be inserted into the cage to provide extra rigidity. Additional bars can be inserted if required at any stage.