How is a cornice defined in a structural context?

In a structural context, a cornice is best defined as an ornamental molding that is typically located at the top of a wall or roof. It serves both aesthetic and functional purposes, providing a finished look to the building while also helping to direct water runoff away from the structure. Cornices can be made from various materials, including wood, plaster, and stone, and are often found in classical architecture, adding character and depth to the building's profile.

Understanding the role of a cornice is crucial in structural design, as it can impact water management and the overall visual appeal of a building. While other features such as decorative borders or structural supports play important roles in architecture, they do not encompass the specific definition and function of a cornice as an ornamental element at the top of a wall or roof.