The purpose of a fire-rated door is to hold back smoke and contain fire long enough for the occupants of a structure to escape. The term fire rated means that the door, when installed properly, is not supposed to combust during a certain time period in the average fire. Fire rated doors are heavier than Residential doors, often made from durable, fire resistant materials like metal or mineral core.
Standard time ratings will vary from 20 min. – 180 min. according to the occupancy of the area in which the door is located. Depending upon area, small companies or government agencies may determine fire ratings.
Certain buildings or remodeling jobs often require a fire rated door. Installations like public buildings, office buildings, in living spaces like dormitories and in exit stairwells regularly call for fire rated doors.
GH doors fire rating is from 90mins to 180mins.
GH HW masonry frames are 180mins fire rating.
GH HW drywall frame are 90mins fire rating.