A container crane is a facility installed at a port terminal for loading and unloading shipping containers from container ships. It consists of structural components, hoisting mechanisms, lateral movement systems, elevation systems, travel systems, auxiliary equipment, and electrical systems.

• Because it is installed in a harbor, it is always subject to wind pressure from the sea.
• Places subject to repeated loads when moving containers up, down, left, and right, and impacts due to the movement of the crane body.
• Places that require periodic retightening with general anti-loosening parts.
• A fastening location is a high place where construction and maintenance are difficult.

• Extended the period for periodic inspections.
• Maintenance costs have also been significantly reduced.
• The retightening work of maintenance management work has been eased, and the workload has been reduced.