Why is maintaining FR rating around penetrations critical?

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Maintaining the fire-resistance rating around penetrations keeps the barrier continuous. When services pass through a rated wall, floor, or ceiling, they create openings that can become pathways for heat, flames, and smoke if not properly sealed. The FR rating assumes a complete, uninterrupted assembly, so without a proper firestop or other listed system around these openings, the intended protection time can be compromised. Using the correct firestop solutions rated for the specific penetration type and installed per the manufacturer's instructions restores the continuity of the rated barrier, helping to prevent rapid fire spread and protect life and property. This is why inspections emphasize penetrations and verify that patches or seals are properly installed, rated for the required time, and properly documented.