Hollow Metal Doors and Frames Fire Rating Checklist - NAAMM

Meet the Fire Rating Requirements: To get a fire rating, the steel doors and frames need to be tested by an independent third-party agency. All fire doors also must be self-closing and equipped with positive latching.  

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Align with the Wall Fire Rating: The required fire rating for any door and/or frame in a commercial building is determined by the fire rating of the wall. The rating for a wall considers a variety of factors such as what the building is used for, the location of the wall, the interior design of the space, and more.  

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Achieve One of the Five Different Ratings: Hollow metal doors and frames have five main ratings which are 20 minutes, 45 minutes, 1 hour, 90 minutes, and 3 hours. The fire rating of a steel door assembly is determined by the specificcomponent of the door assembly with the lowest individual rating.  

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