Lattice girders are industrially prefabricated reinforcement elements according to licence and they are manufactured from plain, profiled or ribbed steel bars according to DIN 488 (acc. to German standard). They consist of a top bar (OG), diagonals (Diag) and bottom bar (UG). The individual elements are connected with each other by means of resistance spot welding. Various systems are available for selection according to requirements. You can find an online sizing programme according to DIN 1045-1:2001 (acc. to German standard) under www.bdw-kehl.de.