What is the minimum transverse pitch allowed for rivets?

The minimum transverse pitch allowed for rivets is widely recognized as 2.5D. The pitch refers to the distance between the centers of adjacent rivets in a transverse direction. This specification is essential for ensuring adequate structural integrity and load distribution.

Using a pitch of at least 2.5D helps prevent issues such as shear and bearing strength failures, which can occur if rivets are too close together. It also promotes proper airflow and minimizes stress concentrations that could lead to material fatigue over time.

This standard contributes to the overall durability and performance of the aircraft structure. Adhering to these dimensions is vital for maintaining safety and reliability in the aerospace industry, ensuring that repairs do not compromise the integrity of the aircraft.