UL-Certified Insulated Steel Fire Door – 5.5h-1.0h Fire Rating High-Security Fireproof Door

UL-Certified Insulated Steel Fire Door 鈥?5.5h-1.0h Fire Rating High-Security Fireproof Door

This UL 10C-listed steel fire door offers adjustable fire ratings from 1.0-hour up to 5.5-hour (tested at 5.5 hours and rateable down to 1.0 hour depending on specification). The insulated mineral core provides thermal barrier protection while the 16-gauge galvanized steel skin resists physical attack, making it suitable for high-security industrial and data-center applications where extended burn-through time is critical.

Key Features

• UL 10C Certified: Positive-pressure fire test rating 鈥?1.0h to 5.5h depending on configuration
• Insulated Core: Dense mineral wool or calcium silicate core with thermal conductivity k-value below 0.05 W/mK
• Galvanized Steel Skin: 16-gauge (1.5mm) G90 galvanized steel for corrosion resistance and impact durability
• Intumescent Edge Seals: Smoke and flame barrier that expands 10x+ when exposed to fire temperatures
• Hardware Ready: Prepped for panic bar, lockset, closer, and astragal (double-door models)

Technical Specifications

• Material: 16-gauge G90 galvanized steel with fire-rated mineral core
• Fire Rating: 1.0h / 1.5h / 2.0h / 3.0h / 5.5h (specify at order)
• Certifications: UL 10C, UBC 7-2, NFPA 252, CE
• Finish: Powder-coated primer (paint-ready) or factory color finish
• Warranty: 5-year structural; fire rating certification lifetime

Applications

• Data centers and server room fire barriers
• Industrial facility fire walls
• Chemical storage and hazardous area doors
• High-security commercial and government buildings

Pricing: Starting at USD (FOB Guangzhou)
Lead Time: 15-20 business days for standard sizes
Includes: Door slab, UL certification documentation, intumescent seals, installation guidelines