UL (Underwriters Laboratories) Listed fire rated steel doors are doors that have been tested and certified by UL to meet specific standards for fire resistance and safety. These doors are designed to prevent the spread of fire and smoke for a specified amount of time, usually ranging from 20 minutes to 3 hours.
Key Features:
- Steel Construction: Durable material providing protection against heat and smoke.
- Fire-Resistant Materials: Cores made of mineral wool or gypsum for insulation.
- Intumescent Seals: Expand when exposed to heat to form a smoke barrier.
- Self-Closing Mechanism: Automatically closes upon sensing heat or smoke.
- Secure Latching: Positive latching systems keep doors closed under pressure.