Tag Archives: Steel Fire Doors

Steel Fire Doors – Ultimate Safety Solution

1. Core Specifications

• Fire ratings: 30/60/90/120/180 minutes (tested to UL10C, BS476, EN1634)

• Standard sizes: 900-1200mm (width) x 2000-2400mm (height)

• Thickness: 45-55mm for standard doors, up to 70mm for high-rating doors

• Weight: 50-120kg depending on rating and size

2. Advanced Construction Features

• Multi-layer protection system:

  • 1.2mm galvanized steel outer skins

  • Ceramic fiber insulation layer

  • Intumescent interlayer (expands at 180°C)

  • Mineral wool core (for higher ratings)

• Reinforced lock block area (3mm steel plate)

• Continuous intumescent seal (3-sided or 4-sided)

3. Performance Characteristics

• Temperature resistance: Up to 1000°C for 90+ minute doors

• Smoke control: Class Sa (EN1634-3) for smoke leakage <25m³/h·m²

• Acoustic performance: Up to 42dB sound reduction

• Thermal insulation: U-value as low as 1.1 W/m²K

4. Specialized Variants

• Combined fire/security doors (EN1627 + EN1634)

• Fire/acoustic dual-rated doors

• Radiation-shielded versions for industrial use

• Curved or oversized custom configurations

5. Installation Requirements

• Approved fire-rated frames (steel or treated timber)

• Fire-rated fixings (minimum 4 hinges)

• Certified perimeter sealing system

• Mandatory third-party inspection post-installation

6. Maintenance Protocol

• Quarterly inspection checklist:

  • Seal integrity verification

  • Hardware functionality test

  • Closure mechanism check

  • Surface condition assessment

• 5-year recertification requirement

7. Certification Marks

• Must display permanent certification label including:

  • Manufacturer ID

  • Test standard

  • Rating duration

  • Certification body

  • Production date

8. Industry-Leading Options

• Single-action vs double-action models

• Glazed versions with ceramic glass

• Bi-directional opening systems

• Integrated smoke detection activation

These doors represent the pinnacle of passive fire protection technology, combining rigorous safety standards with modern engineering innovations. Their application is critical in high-risk environments where compartmentation is essential for life safety and property protection.