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UNI EN 14399 is one of the main standards that regulates structural bolting, and it contrasts with UNI EN 15048. The elements that make up EN 14399 are a bolt, a nut and a washer, products that form pre-loaded assemblies made with HV systems. Pre-loaded assemblies are controlled tightening assemblies that are used when the structure or joint to be created is subjected to tensile forces.
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