Reconfigurable spreader bars are designed for use on multiple heavy-lift projects 

The first-of-its-kind solution combines an ultra-heavy lifting capacity of approximately 9,000 tonnes per spreader bar with the flexibility to be reconfigured and reused across multiple projects.

By proving that even some of the largest lifting equipment in the offshore industry can be designed for reconfiguration and reuse, the project challenges the traditional assumption that heavy-lift assets must be optimized for a single purpose.

The result, said Heerema, “is a lifting asset designed not for a single campaign, but for decades of offshore operations.”

Spreader bars are critical components in offshore lifting operations, distributing loads in rigging systems while maintaining the correct sling geometry as well as creating sling path clearance.

Traditionally, offshore projects require spreader bars in different lengths and configurations because every structure has unique dimensions, lifting points, weight distributions, and sling angle requirements. Whether lifting an offshore converter station, jacket, bridge section, topside, or flare structure, equipment is often designed or modified around the requirements of a specific project.

While effective, this approach can lead to additional fabrication work, engineering effort, transportation, and steel consumption when project requirements change. In some cases, lifting equipment must be modified or returned to shore before it can be used again.

Heerema’s modular spreader bar was developed to challenge this way of working. Instead of creating equipment tailored to a single application, the modular concept allows the spreader bar to be assembled from interchangeable sections. By adding, removing, or rearranging these sections, the same asset can be configured for a wide range of lifting scenarios and reused on future projects. This transforms the spreader bar from a project-specific tool into a long-term offshore asset.

“While modular designs are common in many industries, applying the concept to a spreader bar capable of lifting approximately 9,000 tonnes presented a significant engineering challenge,” the company explained.

“Every connection between the modular sections must safely transfer enormous forces while maintaining full interchangeability between components. 

“Depending on the configuration, the spreader bar experiences different combinations of axial loads, bending moments, and shear forces, all of which must be accommodated without compromising structural integrity or operational simplicity.

“The challenge was not simply to create a strong connection. The challenge was to create a standardized connection capable of performing reliably across a wide range of configurations and load cases.”

To achieve this, Heerema’s engineers developed a robust modular interface that allows sections to be combined while maintaining the strength and stiffness required for offshore heavy lifting operations.

The result is a lifting system that behaves as a single engineered structure while retaining the flexibility of a modular asset. Each spreader bar is capable of handling loads of approximately 9,000 tonnes. For comparison, that is roughly equivalent to lifting 6,000 passenger cars with a single lifting device.

Since entering service earlier this year, the modular spreader bars have already been deployed on five offshore campaigns and seven lifts in total, demonstrating their reliability and adaptability in real-world operations.

Rather than remaining a conceptual innovation, the system has been tested under operational conditions across multiple projects with varying lifting requirements.

“This practical experience has validated the core concept,” said the company, “one adaptable lifting asset can support multiple campaigns while maintaining the performance and safety standards required for offshore heavy lifting.”

The company said the advantages of the modular spreader bar extend beyond engineering. By allowing equipment to be reconfigured between projects, Heerema can reduce the need for new fabrication, minimize transportation requirements, and decrease the amount of material needed over the asset’s lifetime.

Operationally, the system provides greater flexibility when preparing for future campaigns. Instead of mobilizing additional equipment or carrying out extensive modifications, crews can adapt the spreader bar configuration to suit changing project requirements. This reduces logistical complexity while helping projects respond more efficiently to changing conditions. 

The result is an asset that delivers value on multiple fronts: lifting capacity of approximately 9,000 tonnes; multiple configuration options from a single asset; proven deployment across six offshore campaigns; reduced steel consumption over the equipment lifecycle; reduced transport and modification requirements; greater operational flexibility between projects; reduced emissions through asset reuse.

Development of the modular spreader bars was supported by the Netherlands Enterprise Agency (RVO) and the Dutch Ministry of Economic Affairs and Climate Policy because of its potential to demonstrate circular innovation at industrial scale.