Assembling a bolted joint is about more than just tightening a screw – every step must work 100% to ensure a safe and durable result. The difference between theory and practice is significant, and there are many factors to consider throughout the entire process, from design through purchasing and storage to installation.t

At Steel Construction Day 2024, Fred Egman from Atlas Copco, in collaboration with Pretec, gave a lecture on this very subject. Fred has extensive experience in bolted joints and has worked as a production manager at a fastener manufacturer, as a technical manager for bolted joints, and as technical support in the field. In his lecture, he reviews the high demands placed on the bolt – correct installation, proper friction-controlling agents, certifications, etc. – but also raises the important question: what requirements are actually placed on the tightening torque?

Many factors affect the durability of a bolted joint, such as friction, surface treatment, and the right tools. In the film below, you can watch the full lecture and gain valuable insights on how to ensure that the tightening torque is correct in practice.