A fire door is a specially designed door that helps prevent the spread of fire, smoke, and heat from one area to another. It is usually made from fire-resistant materials such as steel, wood, or composite materials. Fire doors are commonly installed in buildings, offices, factories, hospitals, and commercial spaces. They provide valuable time for people to evacuate safely and help protect property during a fire. Proper installation and regular maintenance are essential to ensure that a fire door works effectively in an emergency.