There are different levels of quality when talking about aluminium trusses. There is the quality of the raw material, the quality of welding and the quality on the manufacturing process. Products have to comply with all the relevant international standards and they are tested and certifi ed by the most respectable certifi cation institutes. High quality equals safety. This is guaranteed not only through certifi - cates, but also with common sense and deep knowledge of engineers and installers. The product needs to be calculated and certifi ed through rigorous calculation reports and installation must be tested by a qualifi ed engineer. The Standards that are commonly used for the technical evaluation of a product refer to normative codes issued and recognized at a national and international level. Among these we can mention ANSI, BS, EN, ISO, DIN. Each of these outlines a diff erent calculation approach, still leading to similar results. LITEC’s products and processes are certifi ed by the following bodies: TÜV Süd One of the world’s leading organizations that supplies technical services and certifi es the quality of processes and products. www.tuev-sued.de TÜV Nord International provider of security, inspection and certifi cation services in the fi elds of industry, mobility, natural resources, aerospace, training and IT. www.tuev-nord.de GSI SLV München (Schweißtechnische Lehr – und Versuchsanstalt) They certify that welding quality control process is carried out in accordance with German standard DIN V 4113-3. LITEC is certifi ed at class C, the most demanding of the certifi cation grades, corresponding to the highest levels of quality. www.slv-muenchen.de DVS Zert They certify the process of welding according to the European and international standard EN ISO 3834-2, and provide certifi ed welders’ licenses. DVS Zert is ANBCC (Authorized National Body for Company Certifi cation) for Germany, within EWF (European Welding Federation) and IIW (International Institute of Welding). www.dvs-zert.de DIBt (Deutsches Institut für Bautechnik) They are the Center of Competence in Civil Engineering by certifying the resistance of welding between aluminium extruded profi les and die-cast end plates. They are a member of EOTA (European Organisation for Technical Approvals) and other national and international organisations. www.dibt.de University of Padua – Department of Civil, Environmental and Architectural Engineering They carry out ‘Stress Tests’ on trussing products. www.unipd.it Iuav University of Venice – Department of Architectural Construction They carry out ‘Stress Tests’ on trussing products. www.unav.it