Welding lines for fully automatic production of truss girders made from cold or hot-rolled material off spools or coils.Flexible and quick changeover, with optional fully automatic height adjusting device. Standard version with fixed girder pitch. V-girder version with adjustable feed for girder pitches of 190-210 mm.An optional module for the production of shear reinforcement girders allows the production of either standard girders or shear reinforcement girders.