What type of fire-resistive assembly is typically used to prevent smoke transmission?

The correct choice for preventing smoke transmission is a smoke barrier. Smoke barriers are specifically designed to limit the movement of smoke within a building during a fire, helping to protect occupants, property, and maintain stairwells and exits as smoke-free zones. These barriers are constructed to resist smoke migration by using special materials and design features that meet specific building codes and fire safety regulations.

In contrast, while fire barriers and firewalls are also crucial for fire safety, their primary function is to contain flames and heat rather than specifically targeting smoke control. Fire partitions are similar to fire barriers in that they also serve to compartmentalize spaces for fire protection but do not focus exclusively on smoke transmission. Therefore, the smoke barrier is the optimal choice for addressing smoke control in fire safety protocols.