The construction products described here are metal components formed by welding or soldering metal parts together. The construction techniques described here are structural works or parts thereof which are assembled form these components, in some cases also by welding.

The verification can relate to the welding or soldering process itself (e.g. innovative or modified processes, special applications), but also to the suitability of the metallic materials for welding or soldering (e.g. special steels, special surface treatment). This work area also covers welding consumables.

Regulatory framework

For structural welded components made of steel or aluminium, there is a harmonised product standard, EN 1090‑1.

DIBt grants national technical approvals (abZ) for non-structural welded or soldered metal components, when the manufactured product

• is not covered by a harmonised product standard,
• deviates significantly from the Technical Building Rules (cf. MVV TB, Chapter C 2) or
• when neither Technical Building Rules nor generally recognised technical rules exist for the product.

European Technical Assessments (ETAs) can also be issued for welded or soldered metal components that are not covered or not fully covered by a harmonised standard.

Furthermore, DIBt grants general construction technique permits for applications comprising welded and soldered metal components for which there are no conclusive technical rules regarding design and execution.

Please also refer to the relevant provisions of the federal states following the Model Administrative Provisions – Technical Building Rules (MVV TB).

The party executing the welding work is subject to special qualification requirements, cf. MVV TB Chapter A 1.