Which of the following is NOT a primary design of a roof?

The option that is not considered a primary roof design is raised. In roof design terminology, the primary styles are typically characterized as pitched, curved, and flat.

A pitched roof is designed with sloping surfaces to allow for efficient rain and snow runoff. This design helps prevent water accumulation, which could lead to structural issues. A flat roof, on the other hand, presents a level surface that is often used in commercial buildings, where drainage systems are implemented to manage water. Curved roofs have a more distinctive shape that can contribute aesthetic appeal and can also provide advantages in wind resistance and snow load distribution.

Raised roofs, while they might be seen in certain architectural designs, do not represent a standard classification of roof types used in construction or architectural design discussions. Thus, it does not align with the primary classifications typically recognized in the field.