The welding lines where plates are connected.
: Each individual plate is given a unique coordinate—for example, "B-12" would refer to the 12th plate in the "B" strake. Reference Points : The numbering of frames usually starts at the Rudder Stock
Modern shipyards no longer draw expansion plans manually. They rely on specialized Marine CAD software to calculate the expansion and export the final plans into highly detailed, multi-layered vector PDFs. Common Software Tools Hexagon Smart 3D (formerly Intergraph) SSI ShipConstructor (AutoCAD-based) NAPA Steel Why PDF Format is Preferred for Distribution shell expansion plan pdf
Historically, shipwrights generated these drawings manually in a mold loft using complex geometric projection methods. Today, the process is entirely digital.
Clearly marked positions for sea chests, thruster tunnels, and bilge keels. The welding lines where plates are connected
For completeness, in the world of technology, "shell expansion" has yet another meaning. In Linux and other Unix-like operating systems, the command shell has a function called . This is the process where the shell takes a command entered by the user and expands certain text patterns before executing the command. Common types include:
Detailed technical plans like these are often available on professional repositories: They rely on specialized Marine CAD software to
The longitudinal dimensions (distance between frames) are kept true to the ship’s profile length.