1. General Principles & Regulatory Framework

Mandatory Requirements:

• Never replace the elevator's built-in safety locking systems (mechanical locks, electrical interlocks, Door Lock Monitoring)
• Only add security locks as supplementary protection to existing safety features
• Must comply with:
  • ASME A17.1/CSA B44 (North America) The American Society of Mechanical Engineers
  • GB 7588 (China)
  • EN 81 (Europe)
  • NFPA 101 (Fire Safety)
  • Local building codes and elevator regulations

2. Key Safety Requirements for Additional Locks

2.1 Fire Safety & Emergency Accessibility

• Automatic unlocking upon fire alarm activation
• Fail-safe design: Unlock when power fails
• Central override capability from fire command center
• Two-way communication system near locked doors connecting to attended station
• Emergency lighting on both sides of locked doors

• Must be operable by emergency personnel using universal elevator key (e.g., Gamewell 25460)
• Emergency keys must be clearly marked and accessible only to authorized personnel

2.2 Compatibility with Elevator Safety Systems

• No interference with Door Lock Monitoring (DLM)
• Must not bypass or disable electrical safety interlocks
• Shall not prevent the elevator from operating normally when properly unlocked
• Cannot impede door reopening devices or safety sensors

2.3 Design & Performance Standards

• Locks must maintain integrity under 300N force applied to door surfaces
• Materials must be fire-resistant and corrosion-proof