The UNI EN 1090 standard is a series of European standards that establishes the requirements for the conformity assessment of steel and aluminum structural components, as well as for the CE marking of these construction products:
- Requirements for the conformity assessment of structural components.
- Technical requirements for steel structures.
- Technical requirements for aluminum structures.
- Technical requirements for structural steel elements and cold-formed structures for roof, ceiling, floor and wall applications.
EXC3: The standard introduces different execution classes (EXC1, EXC2, EXC3, EXC4), each with specific technical requirements, depending on the level of risk associated with the structure. EXC3 indicates an intermediate level of complexity and risk, requiring more rigorous control of materials, manufacturing and installation