ANSI stands for American National Standards Institute and it has regulated a 3 level grading system for locks which provide a standard method to measure their durability, strength and quality.
What Does Lock Grade #3 Mean?
Locks with a grade 3 classification offer the most basic level of security and are not recommended for use where high security is needed. These are the most commonly found locks in residential properties and are the most affordable option. If your main entrance door is fitted with grade 3 locks it is highly recommended to upgrade them. Grade 3 doorknobs are capable of withstanding 200,000 cycles, two door strikes and about 150 pound weighing test while Grade 3 deadbolts can endure 100,000 cycles and a 2-door-strike hammer test.
What Does Lock Grade #2 Mean?
Locks of grade 2 offer an medium level of security and may not meet the security needs of commercial buildings and are standards for residential properties. Grade 2 doorknobs should withstand 400,000 lock cycles, about 250 pound weighing test and 4 door strikes. On the other hand grade 2 deadbolts should endure 150,000 cycles and 5 door strikes hammer test.
What Does Lock Grade #1 Mean?
Grade 1 represent the highest level of security hat associated with commercial doors, we’re seeing a growing number of grade 1 locks at residential use especially among electronic lock. The style may be limited and they are more costly. Grade 1 doorknobs should withstand 900,000 cycles, 6 strikes and a 360 pound weighing test. Grade 1 deadbolts should endure 300,000 cycles and at least 10 door strike hammer test.
