Bergandi ECO-PANEL Structural Insulated Reinforced Concrete Panel System Truss Machine Operator Station. The control panel uses a touch screen for the HMI. The operator station rotates and is accessable from all sides of the truss machine. Mid-Frequency. State-of-the art mid-frequency direct current welding technology, improves welds and reduces power consumption. Truss Welding Station. The Truss Welding Section joins the Truss Web to the Truss Chords producing completed Truss Elements. The pitch of the truss web is 4"/8". Truss Shears. The Truss elements are automatically cut to the reguired length. The shears are programmed to cut on 4" or 8" increments depending on the truss pitch.