What must be fitted to adjustable brace locking pins?

Adjustable brace locking pins must be fitted with retaining devices to ensure that they are securely held in place during operation. Retaining devices play a crucial role in maintaining the integrity and safety of the rigging system by preventing the locking pins from unintentionally disengaging while under load. This is vital for the safety of the structure and the personnel involved, as any dislodgement could lead to catastrophic failures.

While other options might seem relevant to certain aspects of equipment maintenance or functionality—such as lubrication systems which address friction, cleaning ports for maintenance access, and shock absorbers that mitigate impacts—they do not specifically address the need for maintaining the security and proper positioning of locking pins in adjustable braces. Retaining devices are essential for ensuring that the pins cannot be accidentally released, thereby enhancing the overall safety and reliability of the rigging system.