What’s the difference between a fire door and an ordinary door？

A fire door is specifically designed to withstand fire and smoke for a certain period, helping to prevent the spread of flames and smoke between different areas of a building. Here are the main differences between a fire door and an ordinary door:

1. Material and Construction:
   • Fire Door: Made from materials that resist fire, such as gypsum, steel, or special fire-resistant glass. They are often reinforced with intumescent seals that expand when exposed to heat to block gaps and keep smoke and flames from passing through.
   • Ordinary Door: Typically made from wood, hollow core materials, or other materials that don’t have the same fire-resistant properties. They aren’t designed to withstand high temperatures for any extended period.
2. Rating:
   • Fire Door: Rated for fire resistance, usually measured in hours (e.g., 30 minutes, 60 minutes). This rating indicates how long the door can hold up against fire before failing.
   • Ordinary Door: No specific fire rating, as they are not intended to provide any significant resistance to fire.
3. Certification:
   • Fire Door: Must be certified and tested to meet building codes and fire safety regulations. This involves rigorous testing and quality control to ensure they perform as required.
   • Ordinary Door: No specific certification for fire resistance.
4. Seals and Hardware:
   • Fire Door: Equipped with fire-resistant seals around the edges and often includes special hardware like self-closing mechanisms and fire-rated hinges.
   • Ordinary Door: Typically uses standard seals and hardware not designed for fire resistance.
5. Installation and Maintenance:
   • Fire Door: Installation must be done carefully to ensure it maintains its fire-resistant properties. Regular maintenance is required to ensure it remains effective.
   • Ordinary Door: Easier to install and maintain but doesn’t require specialized procedures.

Overall, the primary function of a fire door is to enhance safety by containing fire and smoke within a specific area, giving occupants time to evacuate and reducing damage to the building. An ordinary door does not have these fire safety features and is used primarily for access and privacy.