Fire doors are crucial components of building safety systems designed to prevent the spread of fire and smoke. They help protect escape routes and provide safe zones for occupants during an emergency. Here are some key points about fire doors:

1. Purpose: Fire doors are intended to contain fires in one area of a building, giving occupants time to evacuate and preventing damage to property.

2. Construction: They are typically made from materials that can withstand high temperatures, such as steel or special fire-resistant wood. They often have a core filled with fire-resistant materials.