Until today, there have been no harmonised European standards for many construction products, not for structural steel engineering or metal construction either. In this case, products are certified, monitored and/or tested on the basis of the building regulations of the federal states (Federal State Building Regulations) of the Federal Republic of Germany.
For the respective activities as testing, monitoring and certification body according to the Regional Building Regulations, the GSI mbH NL SLV Munich is designated with the identification number BAY23.