In a longitudinally framed ship, what supports the longitudinal frames?

In a longitudinally framed ship, the longitudinal frames are primarily supported by web frames. Web frames are structural components that connect the longitudinal framing members, providing necessary strength and rigidity to the ship's hull. They help distribute the loads experienced by the hull during operation and contribute to the overall structural integrity of the vessel.

The role of web frames is crucial in maintaining the stability of the longitudinal framing system, especially in ensuring that the stresses imposed on the hull are adequately managed. Web frames provide support at intervals along the length of the ship, allowing the longitudinal members to effectively carry and transfer loads without compromising the vessel's design or structural performance.

The other choices, while being structural elements in shipbuilding, do not serve the same function in supporting longitudinal frames. For instance, scantlings refer to the dimensions and thicknesses of materials used, while transverse frames are typically employed to provide lateral support and maintain the hull's shape, rather than directly supporting longitudinal frames. Stringers, which are longitudinally oriented reinforcements, also support the hull but are distinct from web frames in their specific application and design in the hull structure.