Commercial Grade Door Locks Explained
Locks can have three grades: 1, 2 or 3. The Association looks at six qualities when determining a lock's grade: operational (which tests to make sure the door will latch easily when pushed close), strength, cycles (the number of uses a lock can withstand before a replacement is needed), security, material evaluation and finish.
Grade 3 is considered a standard lock, typically used for residential doors. They are also often used in areas not open to all traffic, such as supply closets, offices without expensive equipment or break rooms.
Grade 2 locks are used for residential areas with more traffic, such as a door leading into an apartment building of complex. Some businesses can also use Grade 2 locks for areas that require a higher degree of security. That can include an office or doors to storage rooms housing valuable merchandise, equipment or other materials.
Grade 1 locks are considered the strongest of all. This grade is given to the most secure commercial door locks, locks that are placed at high-traffic areas like schools, hospitals and museums. Grade 1 locks are also expected to have longer lives than lower graded locks.