How Do Fire Door Locks Differ from Standard Door Locks? At first glance, a fire door lock may appear similar to a standard door lock. However, the two are fundamentally different in several critical aspects: Design purposeThe most fundamental difference lies in design intent. Fire door locks are des
DIROCK Grade 4 lever handles deliver premium mechanical and fire-rated performance for doors subject to heavy and violent use in high-traffic commercial and public buildings(e.g. football stadiums, offshore installations (oil rigs), etc). Tested and certified to EN1906 standard, they ensure safety, durability, and compliance in demanding architectural and fire door hardware projects. These handles are typically specified alongside EN 179 emergency mortise locks to form a complete, code-compliant escape route system.
• Reinforced structure & extreme endurance — Constructed with a solid stainless steel core, circumferential welding, and a 1.2 mm wall thickness, the Grade 4 lever handle achieves exceptional structural integrity. This robust construction enables it to withstand 300,000 cycles durability and resist 1,000 N of axial force without deformation, delivering superior long-term performance and reliability in the most demanding environments.
• 480-hour corrosion resistance — Passed extended salt spray testing( EN 1670), offering exceptional protection in humid, coastal, or chemically exposed environments.
• 240-minute fire integrity — Passed fire resistance test for 4 hours on steel fire doors, supporting the high levels of fire and life safety compliance.
