Having detailed instructions for each shipbuilding task and precise sequencing of the workflow is creating efficiencies and reducing rework at shipyards on the east and west coasts of the US.
The work packs that Senesco Marine’s tradesmen are working from provide instructions— including checks and balances and dimensions—for each step of the process. “The person cutting the angles to go on panels has a cut sheet with instructions on how to cut every angle,” explains Joe Bush, VP Operations at Senseco Marine in North Kingstown, Rhode Island. Senesco is a builder of double-hulled barges, tugboats, and other vessels. “The guy welding plates together has a set of dimensions that tells what all the parameters of the plate should be after welding,” he adds, “and there are marks indicating where to lay those angles from the edge of the plate.”
The 2D drawings they used previously “left some things open to interpretation,” observes Bruce Kintner, Senesco’s Engineering Manager, who adds they relied on experienced shipwrights. Now they have a 3D isometric view of every frame and panel, with additional views that include every part and bracket once it is added. “You don’t have the ability to envision what a 3D panel is going to look like from a 2D drawing,” Kintner notes.
Five years ago, Senesco transitioned from a firm that created product models from a 2D lofting package and began working with Genoa Design International Ltd. of St. John’s, Newfoundland.