What is the main purpose of a fire wall?

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Fire walls are designed to stop the spread of fire by creating a continuous, fire-resistant barrier that divides a building into compartments. This containment slows heat and smoke transfer, protecting occupants to allow more time to evacuate and giving firefighters a better chance to control the blaze. To work effectively, the wall is rated for a specific fire duration and extends from foundation to above the roof, with openings and joints that are specially rated and sealed. While it may contribute to overall stability, its primary purpose is containment, not providing access to a fire escape or storing equipment, and it isn’t meant mainly for structural support.