Vastwin (CSL-Vastwin) has completed the roll-on of a 15,300 t offshore platform module — according to Vastwin, China’s first SPMT operation exceeding 15,000 t and the largest single-module SPMT project ever conducted in the country.

The operation involved 500 axle lines and 20 PPUs, enabling safe and precise loading of a 120 m × 78 m × 36 m module. From front-end engineering design through to execution, Vastwin’s team worked with the client to integrate a unified SPMT roll-on plan, replacing segmented lifting and shortening construction duration.

Despite technical challenges, Vastwin ensured smooth execution through detailed simulation, coordinated resource planning, and real-time monitoring. The operation demonstrated close alignment between design, planning, and field performance, confirming procedural reliability throughout.

Following the roll-on operation, the 15,300 t module was transferred onto Boskalis’ semi-submersible vessel Black Marlin using the Float-on/Float-off method for onward transport.

This project sets a new benchmark for China’s heavy transport industry and reinforces Vastwin’s leadership in offshore, modular, and port logistics.