What is the primary purpose of a fire-wall in construction?

The primary purpose of a fire-wall in construction is to prevent fire spread. Fire-walls are designed as protective barriers that prohibit the passage of fire and smoke between different areas of a building or between adjacent structures. By utilizing fire-resistant materials and specialized construction techniques, these walls compartmentalize a structure, thereby limiting the potential for a fire to spread beyond its point of origin. This is vital for ensuring the safety of occupants and assisting emergency responders by allowing more time for evacuation and containment.

While other options, such as supporting structural elements like the roof or providing insulation, contribute to overall building safety and efficiency, they do not capture the essential function of fire-walls. Fire protection is the primary focus, aiming to save lives and protect property by controlling potential fire hazards.