Abstract: A method for making grids or baskets of reinforcing rod or wire, especially for use in the construction of hollow concrete bodies, in which a group of circumferentially spaced first rods or wires moving in the direction of the length thereof have a second rod, or wire, wrapped thereabout in a helical path; while electrodes are provided which rotate around the group of rods, or wires, and are operable to weld the rods, or wires, together at each point of intersection thereof by the combination of welding current and pressure, while relieving the pressure and interrupting the current while the electrodes are between the points of intersection.