UL Fire Rated Door Hinge for Office Door

UL Fire Rated Door Hinge for Office Door - D&D HARDWARE 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 compa…