UL Listed Steel Fire-Rated Unequal Leaf Door by YK Fire Door Supplier
As a trusted fire door manufacturer with over 20 years of experience, YK Door Industry Co., Ltd. specializes in delivering high-performance, fully certified fire protection solutions. Among our leading products is the UL listed steel fire-rated unequal leaf door, engineered to meet the demands of modern safety standards in both commercial and residential environments.
What Is a Fire-Rated Unequal Leaf Door?
A steel fire-rated unequal leaf door, also referred to as a fire-resistant door with active and inactive leaves, is specifically designed for wide openings while preserving structural fire safety. The unequal configuration consists of one larger active leaf and one smaller inactive leaf, offering both functional flexibility and space efficiency. This setup is ideal for corridors, utility rooms, and areas where equipment or personnel require wider or occasional access.
Certified to UL Fire Door Ratings Standards
Our UL certified fire doors conform strictly to UL 10B and UL 10C fire testing standards, ensuring outstanding fire resistance performance. These doors are available with fire ratings of 30, 60, and 90 minutes, tested for thermal insulation and structural integrity under high-temperature exposure. YK’s UL fire-rated doors are also tested for hose stream impact resistance, making them compliant with international building codes and insurance requirements.
UL fire door ratings classify products by how long they can withstand fire exposure. Our UL listed unequal leaf models utilize galvanized steel sheets with fireproof perlite board infill, delivering top-tier fire protection while remaining environmentally safe and non-toxic.
Key Features and Specifications
| Specification | Description |
|---|---|
| Fire Rating | 30 / 60 / 90 minutes |
| Material | Cold-rolled galvanized steel |
| Leaf Thickness | 40mm, 45mm, 55mm (varies by rating) |
| Frame Depth | 90mm, 112mm, 120mm |
| Infill Material | Fireproof perlite board |
| Surface Finish | Powder coating / Heat transfer printing |
| Glass Options | Vision panel (customizable sizes) |
| Hardware | Fire-rated lock, hinge, closer, bolt, sequencer |
| Sealing System | Intumescent fireproof seal strips |
| Application | Commercial buildings, factories, hospitals, apartments |
These unequal leaf fire doors can also be manufactured with vision panels to meet safety and visibility requirements without compromising fire integrity.
Why Choose YK Fire Door Supplier?
At YK Door Industry, we stand out as a professional fire door supplier with a consistent focus on quality, safety, and customization. Whether you’re looking for a UL listed fire rated door, a galvanized steel fire door, or a custom fire resistance door, we deliver tailored solutions at scale.
Advantages of Choosing YK Fire Doors:
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✅ Certified by UL, BS, WHI, CCC, ISO9001:2008
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✅ Eco-friendly infill materials rated A1 for combustion and ZA2 for toxicity
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✅ Seamless appearance without welding marks
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✅ Easy operation with low opening force (<66N)
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✅ Over 600 sets produced daily with 35-day delivery
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✅ Expert pre-sales consultation and responsive after-sales service
Packaging, Delivery, and Support
All fire doors are carefully packed using bubble bags and reinforced wooden frames, ensuring safe transportation worldwide. Delivery is fulfilled within 35 days post-payment, supported by reliable long-term logistics partners.
At YK Door Industry, your safety is our priority. Our after-sales team is committed to resolving any concerns promptly and professionally.
Get Your Custom Fire Door Quote Today
Whether you need a fire-rated door for high-rise buildings, fire resistance steel door for industrial use, or a UL listed unequal leaf fire exit door, YK Door Industry Co., Ltd. is your trusted global supplier.
📞 Contact us today to get expert advice and a custom quote tailored to your fire protection requirements.
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