Building safety relies heavily on small components that most people overlook on a daily basis. One of the most critical elements of any commercial or residential building is the fire door lock. When a severe emergency strikes, standard hardware easily melts, warps, or fails under extreme heat.

American National Standard Institute (ANSI) ANSI 156.13 ItemANSI 156.13 Cycle-testGrade 1-1,000,000Grade 2-800,000Grade 3-800,000Fire TestPass UL 10 C 3 hours fire testAnti-corrosionSalt Spray Test 200 hours 1.SCOPE 1.1 This Standard establishes performance requirements for Mortise Locks and