What do fire walls do in a building?

Fire walls serve a critical function in a building by separating two adjoining structures, providing a crucial safety measure against the spread of fire. These walls are constructed to withstand severe fire conditions and are designed to prevent flames and heat from passing from one side to the other, thereby safeguarding occupants and property.

The primary purpose of fire walls is to create compartments within a building, which limits how far a fire can spread, ultimately aiding in controlling and extinguishing a fire more effectively. This aspect not only protects lives but also helps in minimizing property damage.

While fire walls can have some influence on the overall structure's stability, their main focus is not to support the roof directly. Their role in aesthetics is minimal, as their design is primarily functional rather than decorative. Additionally, although fire walls may offer some level of insulation against heat, their primary function is not insulation but fire containment and prevention. Thus, the option that correctly identifies the primary role of fire walls is their function in separating adjoining structures.