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Structural Design & Modifications

STRUCTURAL DESIGN & MODIFICATIONS

At Offshore Projects Consultants, we provide practical structural engineering solutions for marine, offshore and heavy transport applications. Our experience spans vessel modifications, offshore structures, temporary works, equipment integration and bespoke steelwork design, with a strong focus on buildability, operational practicality and compliance with industry standards.
We understand that successful structural design is not only about meeting calculation requirements; it is about delivering solutions that can be safely fabricated, installed, transported and operated in demanding real-world environments.

Our Capabilities

Our structural engineering services include:

  • Derivation of lifting and transport loads
  • Finite element analysis and hand calculations
  • Structural assessment and modifications for vessels and offshore structures
  • Equipment integration and foundation design
  • Fatigue life evaluation
  • Design of seafastenings, load spreading arrangements and grillages
  • Deck strength evaluation
  • Design of lifting equipment and lift points
  • Temporary works design
  • Production of 3D models, class approval drawings and fabrication drawings

We regularly support projects involving offshore construction, marine transportation, subsea operations, RoRo loadouts and heavy lifting activities.

Practical Engineering Approach

Our engineering approach is grounded in practical offshore and site experience. We work closely with clients, fabricators and installation teams to ensure designs are efficient, buildable and suited to the operational constraints of the project.
Where existing drawings or vessel data are limited, OPC can utilise in-situ surveys and LIDAR scanning to rapidly develop accurate structural models and design information.
Using advanced analysis tools and parametric modelling techniques, we are able to efficiently assess multiple design options and optimise solutions for weight, fabrication simplicity and operational performance.

Compliance & Standards

Structural designs are developed in accordance with relevant offshore, marine and structural engineering standards. OPC routinely works in accordance with IACS class society rules, structural designs are generally carried out in accordance with some of the following standards:

  • DNV-OS-C101
  • DNV-ST-N001
  • DNV-RU-SHIP
  • DNV-ST-0377 (2.22)
  • DNV-ST-0378 (2.22)
  • DNV-ST-E273
  • Eurocode 3
  • IACS Common Structural Rules

Supporting Offshore Operations

OPC has extensive experience supporting offshore and marine operations where structural integrity is critical to safe execution. From transport grillages and lifting arrangements to vessel modifications and temporary works, we provide engineering solutions tailored to the realities of offshore projects.
Whether supporting a single modification or a complex multi-discipline offshore campaign, our focus remains the same: practical engineering, clear communication and reliable delivery.