Posted on August 5, 2026
By: Kristin Martel-Tech Mgr for Elliott Bay Design Group
Every successful vessel construction project relies on more than a well-developed design. Before steel or aluminum is cut, engineering concepts must be transformed into detailed production information that shipyards need to fabricate, assemble, and construct a vessel efficiently and accurately. That transformation occurs through lofting.
Lofting involves converting a vessel design into a highly detailed three-dimensional computer model that is then broken down into individual components, much like a jigsaw puzzle. Each plate, shape, stiffener, bracket, and structural member is defined and developed to support fabrication and assembly. While lofting is most commonly associated with structural components, it can also be applied to piping and other vessel systems when required.
Serving as the critical link between design and construction, lofting provides shipyards with the production-ready information needed to move a project from engineering to fabrication. Detailed production models help identify potential issues before construction begins, reduce costly rework, improve fit-up during assembly, support material planning, and improve production efficiency. The result is a smoother, more predictable construction process.
At EBDG, we don’t just design vessels. We create the production-ready information that helps shipyards build them.
EBDG has extensive experience providing lofting services for both new vessel construction and refurbishment projects. Our team has supported a wide range of vessel types, developing production models and detail engineering packages for steel and aluminum vessels built at shipyards throughout North America. We use a variety of software tools, including ShipConstructor, Navisworks, and SolidWorks.
We understand that every shipyard has unique facilities, workflows, production methods, and construction practices. That is why our lofting and detail engineering solutions are tailored to meet the specific needs of each project. By aligning our work with the shipyard’s preferred approach to fabrication and assembly, we help improve productivity, reduce risk, and optimize cost efficiency throughout the construction process.
NavisWorks model showing the hull of a new-construction tug
Our comprehensive lofting services include:
- Computer-generated lofting and production modeling
- Structural detailing and construction drawings
- Plate and shape development
- Weld Marking
- Modular outfitting packages
- Fabrication support documentation
- Piping systems installation drawings
- Spool drawings
- Reports for material ordering/planning, detailed weight estimates
- Bill of Materials
- 3D model
- Submittal drawings (ABS, USCG, etc.), generated from the model
Example drawings generated from ShipConstructor model
Whether supporting a new vessel build, a major conversion, or a complex refurbishment project, EBDG’s lofting team works closely with shipyards, owners, and project stakeholders to transform engineering intent into practical, buildable solutions.
While lofting often takes place behind the scenes, its impact can be seen in every stage of vessel construction. Accurate production information allows shipyards to build with greater confidence, efficiency, and precision. As vessel designs continue to evolve and project schedules become increasingly demanding, experienced lofting support remains an essential component of successful vessel delivery.
Whether supplementing in-house resources, supporting a new vessel program, or assisting with a complex refurbishment project, EBDG’s lofting team provides the production-ready information shipyards need to keep projects moving forward.
If your team is evaluating upcoming construction, conversion, or refurbishment work, our lofting professionals are available at www.ebdg.com . We’re happy to support your next project.
Sectioned view of a barge showing structure and piping systems modeled
