Ontario Building Code Practice Exam

Fire-rated door assemblies in commercial buildings are required to have a non-combustible frame, a self-closing device, and be labeled with a fire rating. These requirements are in place to ensure that the door can effectively contain a fire and prevent it from spreading to other areas. Minimum height is not a requirement for fire-rated doors as they can vary in size, but the other options are necessary for the proper function of a fire-rated door.