File:ShipHullStructure.png

Summary
This drawing of a ship's hull structure, including primary, secondary, and tertiary structural elements and loads, was created on 2006-05-02 by George William Herbert. This file is licensed for Wikipedia and any other use under the Creative Commons Attribution Share-alike license version 2.5  Georgewilliamherbert 21:51, 2 May 2006 (UTC)

Caption (from Strength of ships): Primary (1), Secondary (2), and Tertiary (3) structural analysis of a ship hull. Depicted internal components include a watertight bulkhead (4) at the primary and secondary level, the ship's hull bottom structure including keel, keelsons (longitudinal girder), and transverse frames between two bulkheads (5) at the secondary level, and transverse frames (6), longitudinal stiffeners (7), and the hull plating (8) at the tertiary level.