Fire rated openings include fire doors, fire rated frames and fire rated hardware all certified by independent agencies to ensure compliance with codes and standards. Fire rated openings are rated on their ability to stop the spread of fire, which is measured in minutes or hours:
· 20-minute: typically used for an interior suite entry fire door to restrict airflow and stop the spread of smoke.
· 45-minute: can be used in many fire door applications in 1 hour fire rated walls. Typical uses include separations in corridors, electrical closets, garbage rooms, storage units, stair wells and between rooms.
· 90-minute: used in 2 hour rated walls typically in areas where the risk of fire spreading is high, such as stairwells, elevator shafts, furnace rooms, electrical rooms, boiler rooms and commercial kitchens.
· 3-hour: used in large commercial and industrial buildings to section off different areas in the building.
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