Which assembly is designed to prevent the spread of fire within a structure?

The Fire Protective Assembly is specifically designed to prevent the spread of fire within a structure. These assemblies are constructed from various materials and are strategically installed in a building to compartmentalize areas, thus limiting the movement of fire and smoke. For example, fire walls, fire doors, and fire-rated floors are components of such assemblies that are essential in creating a fire-resistive environment. Their effectiveness is based on building codes and standards that specify the duration for which these assemblies must withstand fire before failing.

While fire alarm systems and smoke control systems play critical roles in fire safety—by detecting fire and managing smoke, respectively—they do not actively prevent the spread of fire; they are reactive measures that alert occupants and help mitigate danger. Fire blocking assemblies, while also important for limiting airflow and fire spread, can be considered a subcategory of fire protective assemblies but may not cover all the comprehensive elements that the main category entails. Therefore, the Fire Protective Assembly is the most appropriate answer, as it encompasses the broader intent of creating a barrier against the spread of fire within a facility.