Engineering Experience and Best Practices in Relocating STS Cranes, Quay Cranes, and RTGs
Transporting Ship-to-Shore (STS) cranes and RTG cranes is a high-stakes engineering endeavor requiring extensive experience, sophisticated calculations, and precision execution due to extreme dimensions, elevated centers of gravity, and heavy structural weights. Below are crucial engineering insights and lessons learned from major crane relocation projects executed by Tan Cang Tech.
1. Comprehensive Structural Surveys Before, During, and After Relocation
A rigorous structural inspection is vital to identify existing structural stresses, fatigue cracks, or corrosion on the crane portal frame prior to transit. Inadequate bracing or incorrect support positioning during barging can induce dangerous dynamic stresses, causing structural deformation or weld cracking during sea voyage.
2. Specialized Sea Fastening and Diagonal Structural Bracing
During maritime transport, ocean swells and tidal motion generate dynamic rolling, pitching, and heaving forces. Custom-engineered steel diagonal braces and deck stoppers must be welded between the crane portal legs and the barge deck to absorb transverse and longitudinal acceleration forces in strict accordance with marine warranty surveyor (MWS) standards.
3. Tidal Synchronization and Precision Ballast Management during Ro-Ro
Roll-on and Roll-off (Ro-Ro) operations between the wharf edge and the transport barge represent the most critical operational phase. As multi-hundred-ton cranes cross the ramp onto the barge, high-capacity internal ballast pumps must dynamically balance water ballast tanks in real time to maintain a level deck and prevent severe ramp deflection or structural tilting.
4. Post-Transport Calibration, Alignment, and Re-Commissioning
Following roll-off at the destination port, the crane undergoes non-destructive weld testing (NDT), 3D laser alignment of gantry wheel bogies, reconnecting of electrical power feeds, and comprehensive static/dynamic proof load tests before reintegration into commercial terminal operations.
With decades of specialized maritime heavy-lift experience, Tan Cang Tech remains the premier partner for safe, reliable, and turnkey crane relocation projects throughout Vietnam and Southeast Asia.
