What are the most common types of devices used to control the spread of the fire to adjoining fixtures?

The most common types of devices used to control the spread of fire to adjoining fixtures are fire barriers. Fire barriers are designed specifically to restrict the spread of fire and smoke between different areas of a building. They are constructed from fire-resistant materials and are crucial in providing a physical separation that can prevent fire from moving through walls, floors, and ceilings.

While portable fire extinguishers are important tools for extinguishing small fires and preventing their escalation, they do not act as barriers in the same manner as fire barriers do. Sprinkler systems also play a vital role in controlling and extinguishing fires but are typically employed to suppress fire once it has started, rather than preventing its encroachment into other areas. Fire blockers, while they may refer to certain devices aimed at slowing down or obstructing fire spread, are not as standardized or recognized in fire protection terminology as fire barriers.

Thus, fire barriers are specifically designed for the purpose of controlling fire spread, making them the most appropriate choice in this context.