1. Field of the Invention
The invention relates to a structure for welding airport concrete steel mesh, wherein each separate transversely extending reinforcing rod in the steel mesh is simultaneously welded to all the longitudinally extending spaced apart reinforcing rods, the separate transversely extending rods are automatically fed onto the longitudinally extending reinforcing rods of a welding position, and the welded transverse and longitudinal rods are automatically indexed away from the welding position.
2. Description of the Prior Art
Prior automatic mesh welders have usually not been capable of welding heavy reinforcing rods such as 3/4" reinforcing rods into steel mesh such as that required for airport concrete runway reinforcement. Further, wherein steel mesh welding has been accomplished in the past, welding has been limited as to spacing between the reinforcing members due to welding gun diameter limitations, and welds have not always been satisfactory due to low welding gun pressures available. Wherein satisfactory mesh welding has been accomplished in the past, the equipment necessary therefor and the methods used have been complicated and therefore uneconomical.