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D&D HARDWARE’s UL Fire Rated Door Hinge (Model: DDSS002-FR) is a safety-critical door hinge engineered exclusively for fire doors in commercial and high-safety environments, with a primary focus on office buildings. As a core part of our comprehensive door hardware portfolio, this hinge works seamlessly with our door closers, panic exit devices, and door locks to form a complete, code-compliant door opening solution.
Tested and certified by UL (Underwriters Laboratories) to meet UL 10C standards, this hinge maintains door integrity and functionality during a fire emergency—withstanding 3 hours of direct flame while supporting the door’s weight and ensuring smooth swinging or automatic closure. Crafted from high-grade stainless steel (SUS201, SUS304, SUS316) and manufactured under D&D’s ISO9001 quality management system, it resists sagging, warping, or detachment at extreme temperatures, preserving building fire compartmentation and protecting lives and property. With over 18 years of experience as an SGS-audited door hardware manufacturer, D&D ensures this hinge meets global fire safety codes, making it a reliable choice for international export projects.
Unlike standard door hinges, our UL Fire Rated Door Hinge undergoes rigorous testing to UL 10C standards, withstanding 3 hours of direct flame exposure. It keeps the door leaf securely in place and maintains pivotal function throughout the fire rating period, ensuring compliance with global fire safety codes (NFPA 80, ANSI). This is critical for office buildings, where rapid evacuation and fire containment are non-negotiable.
Crafted from SUS304/SUS316 stainless steel (SUS201 optional), the hinge offers exceptional durability: tensile strength ≥ 520 MPa and 96-hour salt-spray resistance. It resists rust, corrosion, and wear—even in high-humidity or coastal environments. Compared to inferior hinges, D&D’s design ensures long-term load-bearing performance, reducing replacement costs and maintenance frequency.
Equipped with twin ball-bearing knuckles, the hinge rotates 180° smoothly with an operating torque < 1.5 N·m, eliminating squeaks common in busy office entrances. This silent performance enhances workplace comfort while ensuring reliable operation for thousands of cycles—ideal for areas with frequent foot traffic (e.g., office lobbies, meeting rooms).
Available in multiple size combinations (4.5"x4.0" and 4.5"x4.5" leaves, 3.0mm-4.6mm thickness), the hinge fits wooden doors, metal doors, and fire-rated doors of varying weights. It seamlessly integrates with D&D’s door handles and door locks, ensuring a cohesive, code-compliant door system for any office layout.
Five premium surface treatments (SSS, PSS, AB, AC, PVD) deliver uniform color and a protective coating (≥ 0.3 µm) that resists fingerprints and scratches. The finishes complement modern office design styles (contemporary, traditional) while maintaining the hinge’s corrosion resistance—perfect for preserving the professional look of office interiors.
With a single-hinge load rating of 120 kg (480 kg for a 4-hinge set), the hinge supports heavy office doors (e.g., soundproof meeting room doors, fire-rated security doors). This strength ensures the door remains stable even under daily use, preventing sagging that can compromise fire safety or door functionality.
Beyond UL 10C, the hinge meets CE, ANSI, and BHMA standards, making it eligible for export to Europe, Americas, Middle East, and Asia. D&D’s ISO9001 quality system ensures every unit is inspected—from raw material to final assembly—guaranteeing consistent performance for international office projects.
Ideal for office entrances, meeting rooms, executive offices, and stairwells. The hinge’s fire resistance and silent operation meet the dual needs of office safety and comfort, while its versatile sizing fits standard and custom office doors. It works seamlessly with D&D’s panic exit devices for emergency evacuation routes.
Suitable for hotel guest room doors, conference halls, and fire exits. The aesthetic finishes (e.g., PVD, AB) match luxury interiors, while the 3-hour fire rating ensures compliance with hotel safety codes. Pair with D&D’s door viewers for enhanced guest security.
Perfect for patient room doors, ICU entrances, and medical supply rooms. The SUS316 stainless steel option resists corrosion from cleaning chemicals, and the silent operation minimizes disruption to patients. It integrates with D&D’s thumbturn bathroom locks for patient privacy.
Protects server room fire doors and mall entrances. The high load capacity supports heavy security doors, while the UL certification ensures critical data centers meet fire safety requirements. Combine with D&D’s door seals to enhance fire and smoke containment.
Meets the strict safety standards of schools (classroom doors, auditoriums) and government offices (secure meeting rooms). The durable construction withstands heavy use by students or staff, and the global certifications simplify procurement for public projects.
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Main Product:
door hinges,
door locks ,
panic exit device,
door closers,
door handles,
door hardware
