Assembling a bolted joint involves more than simply tightening a screw – every step must work perfectly 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 and procurement to storage and installation.

During the Steel Construction Day 2024, Fred Egman from Atlas Copco, in collaboration with Pretec, gave a lecture on this very topic. Fred has extensive experience in bolted joints, having worked as a production manager at a fastener manufacturer, as a technical specialist in bolted joint technology, and in technical support within the field. In his presentation, he discusses the high demands placed on bolts - proper installation, correct friction-controlling agents, certifications, and more - but also raises an important question: what requirements actually apply to the tightening torque?

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