Designers create a fire rated door to withstand fire for a certain period, helping to slow the spread of flames, smoke, and heat. These doors are crucial in protecting lives and property during a fire emergency. Manufacturers build fire rated doors from materials like steel, timber, or glass, testing them to endure extreme heat and flames. Experts measure the door’s fire resistance in time, commonly referring to it as a ‘fire rating. This rating indicates how long the door can resist fire—such as 20, 60, or 90 minutes—before it begins to fail.