Which of the following statements correctly describes a semi-monocoque structure?

A semi-monocoque structure is characterized by the incorporation of both the outer skin and internal reinforcing members that work together to distribute loads. This design allows for enhanced strength and stability, making it effective in handling various stresses experienced during flight. The outer skin in a semi-monocoque design contributes to the structure's integrity, but it is the internal frameworks—such as ribs, stringers, and frames—that provide the necessary support and rigidity. This combination ensures that the structure can endure bending, torsion, and shear forces, which is crucial for the aircraft's performance and safety.

The other references to this structure, like relying solely on the outer skin, limit the understanding of how it operates. Additionally, while semi-monocoque designs are not exclusive to any specific size of aircraft, they are commonly used across various types, including larger commercial and military aircraft. The general perception that they are less common than monocoque structures overlooks their crucial applications in modern aviation as they offer a blend of strength, weight efficiency, and design flexibility.