In this design every floor plate will have 3 frames. The frames are joined together with the help of floor angle iron transverse. The frames run tranversally to the hull structure. In this design there is a plate floor every 3.05 meters and a frame every 1 meter. Though this hull design is outdated, it is still used for smaller ships of length less than 120 meters. The two main methods that are used for hull construction are : Keel plate - They are used to join floor plates to the keel of the ship. Side Girders - Inter coastal plates that are used to join two floor plates. They are attached to the margin plates to resist excessive bending stress. Plate floors run longitudinally throughout the hull floor as shown in the figure.įlanged Bracket -Triangular shaped Iron brackets that are welded where the two frames meet. Plate Floor or Floor plate - A steel plate which is welded to the floor of the hull. They form the basis of any design and all hull designs consist of frames. Frames are welded to the sides of the hull as shown in the figure. We will quickly go through the basic terms that are required to understand a design.įrame- It is a steel plate that runs longitudinally or transversely throughout the hull structure. Terms in ship hull designįor understanding a hull structure, it is important to know the basic terms.

In this article we will have a look at the basic ship hull designs which are commonly used.

Naval architects use different methods for hull construction keeping in mind the purpose and type of ship. Not only that, a hull requires high durability and resistance to prevent structural damage in case of collision or grounding. As hull is continuously in contact with water, it is under the effect of different types of forces acting at the same time. Engineers have been continuously innovating hull designs to provide greater structural strength. In the history of naval architecture, hull designs has evolved over a period of time, from cylindrical wooden shanks to steel columns. The hull is one part of the ship that requires extra concern during design and construction.

Margin plate ship construction