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Which of the following is not a requirement for a fire-rated door assembly in a residential building?

  1. Non-combustible frame

  2. Self-closing device

  3. Labeled with a fire rating

  4. Minimum height of 2.1 meters

The correct answer is: Minimum height of 2.1 meters

A A non-combustible frame is a requirement for a fire-rated door assembly in a residential building as it helps contain the spread of fire. B: A self-closing device is necessary for a fire-rated door assembly in a residential building as it ensures that the door closes automatically in case of a fire. C: A label indicating the fire rating is an important requirement for a fire-rated door assembly in a residential building as it provides information about the door's ability to withstand fire for a certain period of time. D: The minimum height requirement of 2.1 meters is not a necessary requirement for a fire-rated door assembly in a residential building. This measurement may vary based on building codes and regulations, but it is not directly related to the door's ability to contain and resist fire.