Heavy-Duty Steel Fire Rated Doors
Heavy-Duty Steel Fire Rated Doors suppliers
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Heavy-Duty Steel Fire Rated Doors manufacturers
Heavy-Duty Steel Fire Rated Doors manufacturers
Heavy-Duty Steel Fire Rated Doors manufacturers
Heavy-Duty Steel Fire Rated Doors factory
Heavy-Duty Steel Fire Rated Doors factory
Heavy-Duty Steel Fire Rated Doors factory
Heavy-Duty Steel Fire Rated Doors high quality
Heavy-Duty Steel Fire Rated Doors high quality
Heavy-Duty Steel Fire Rated Doors
2.Size: Custom sizes
3.Color: Customizable
4.Certifications: CE, 3C, AS
5.Suitable for: Commercial buildings, villas, hotel projects, private residential projects, etc.
6.Trade Terms: DDP, CIF, FOB, EXW, CFR
SGL steel fire rated doors offer up to 240 mins of certified protection. Ideal for commercial projects and villas. Fully customizable. FOB/EXW terms available.
Shaanxi SGL Doors&Windows Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of heavy-duty steel fire rated doors in China, also supports customized service. Please feel free to wholesale high quality heavy-duty steel fire rated doors for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Heavy-Duty Steel Fire Rated Doors Built for Absolute Compliance
When structural integrity and human life are on the line, standard doors fail. SGL engineers heavy-duty steel fire rated doors specifically designed to contain active flames, block lethal and toxic smoke, and buy crucial evacuation time. Whether you are a building contractor securing a massive commercial complex, a villa owner upgrading residential safety, or an individual buyer replacing a non-compliant entry, our doors deliver uncompromising performance.
We strip away the guesswork. You get a door built around a robust cold-rolled steel frame, filled with a high-density mineral wool core, and sealed with professional-grade intumescent strips.
Core Advantages:
- Extreme Fire Resistance: Tested and certified to withstand direct fire exposure for up to 240 minutes.
- Smoke Containment: Heat-activated seals expand to block 99% of cold and hot smoke penetration.
- Acoustic Isolation: High STC ratings keep loud industrial or street noise out of living and working spaces.
- Structural Stability: Heavy-gauge steel prevents warping, buckling, or failing under extreme thermal shock.
Technical Specifications
| Component / Metric | Specification Details |
| Door Frame Material | 1.5mm - 2.0mm Cold-rolled steel / Galvanized steel |
| Door Leaf Thickness | 45mm, 50mm, or custom dimensions |
| Door Leaf Material | 1.0mm - 1.2mm Cold-rolled steel / Galvanized steel |
| Internal Core | High-density Mineral wool core (Non-combustible, A1 grade) |
| Fire Rating | 30, 60, 90, 120, 180, and up to 240 minutes |
| Smoke & Heat Seals | Perimeter intumescent seals (expands at 150°C) |
| Vision Panel (Glass) | Optional: Ceramic fire-rated glass / Wire glass (Low-E available) |
| Hardware Components | UL Listed panic bars, heavy-duty hinges, door closers |
| Surface Finish | Epoxy powder coated, primed, or wood-grain transfer |
| Acoustic Rating (STC) | 35 dB - 45 dB (depending on core configuration) |
Certified Steel Fire Doors for Maximum Compliance and Safety
Failing a local building fire inspection is a contractor's worst nightmare. It halts project handovers, delays payments, and triggers costly refits. Furthermore, property owners constantly battle high HVAC costs due to poorly insulated doors, alongside tenant complaints regarding noise bleed in high-density living situations.
SGL solves these engineering and compliance hurdles at the manufacturing level. We supply fire rated steel doors for multi family housing that not only meet strict municipal fire codes but also feature massive sound-dampening capabilities. By utilizing specific core materials, our doors trap heat and block sound transmission, solving both safety and comfort issues simultaneously.
For contractors managing large-scale builds, sourcing reliable materials on time is critical. We specialize in wholesale steel fire rated doors for contractors, ensuring that every unit arriving at your job site carries the correct certification labels, fits the exact rough openings, and installs without requiring field modifications.
Engineering Breakdown: Why SGL Doors Outperform
1. Global Certification Standards (UL, BS476, EN)
Feature: Our steel fire doors are rigorously tested and certified to meet UL 10B/10C, British Standard (BS476 Part 22), and European (EN 1634-1) norms.
Advantage: The doors are legally recognized by fire marshals and building inspectors worldwide.
Benefit: You eliminate the risk of compliance failures. Whether you are asking for a 60-minute rating or inquiring about the UL listed 3 hour fire rated steel door price, you are paying for guaranteed, legally binding protection that lowers building insurance premiums and ensures occupant survival.
Advanced Thermal Insulation (Mineral Wool Core)
Feature: SGL doors utilize a tightly packed, heavy-density mineral wool core rather than standard honeycomb paper or polyurethane.
Advantage: Mineral wool is an A1 non-combustible material. It does not burn, melt, or release toxic gases when subjected to 1000°C+ temperatures. Furthermore, it boasts an excellent R-value for thermal resistance.
Benefit: For property owners, this means the fire stays in the room of origin. In daily use, it acts as a massive thermal barrier. If you install our exterior steel fire rated doors with thermal break, you actively prevent indoor heating and cooling from escaping, drastically reducing your seasonal energy bills.
H3: Cold-Rolled Steel Frame & Intumescent Seals
Feature: We construct our frames using 1.5mm+ cold-rolled steel, fitted with specialized intumescent seals along the rabbet.
Advantage: Cold-rolled steel provides superior tensile strength against physical impact and thermal warping. At 150°C, the intumescent seals chemically react and expand to up to 15 times their original volume.
Benefit: During a fire, the metal frame will not buckle and jam the door shut. The expanded seals instantly plug all gaps between the door leaf and frame, stopping the number one cause of fire-related casualties: toxic smoke inhalation.
Application Scenarios
FAQ
Q: What is the lead time for a standard container order?
A: For standard colors (Black, Grey, White) and profiles, production takes 25-30 days. Custom powder coat colors or specialized glass configurations may extend this to 35-40 days.
Q: Which hardware brands do you recommend for the Tilt & Turn system?
A: We strongly recommend Siegenia (Germany) or Sobinco (Belgium) for sashes wider than 800mm or heavier than 80kg. For smaller, lighter windows, high-quality Chinese brands like Hopo or CMECH are cost-effective alternatives with reliable performance.
Q: Can these windows come with nailing fins for US wood-frame construction?
A: Yes. We offer an integral nailing fin (flange) profile design specifically for the North American market, ensuring easy installation into timber frame openings with proper flashing integration.
Q: How do you prevent glass breakage during export shipping?
A: We use fully enclosed plywood crates (ISPM 15 compliant, fumigation-free). The windows are separated by foam spacers and strapped securely. We have a breakage rate of less than 0.5% over the last 5 years.
Q: What are the maximum dimensions for a single sash?
A: With heavy-duty German hardware, we can manufacture single sashes up to 1400mm wide by 2400mm high. However, the width-to-height ratio must be calculated to ensure hinge longevity.
Q: Do you provide installation instructions?
A: We provide detailed CAD section drawings and installation videos. While we do not send installation teams overseas, we offer technical support to your local contractor to ensure the sub-frame and water-proofing are handled correctly.
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