.When it comes to your businesses door hardware needs, The American National Standards Institute (ANSI) and the Builders Hardware Manufacturers Association (BHMA), recommend two classifications of door hardware: Grade 1 and Grade 2.
The differences between the two classifications are significant. The pulling force needed to separate a knob or lever from its spindle is about 60% greater on a Grade 1 than a Grade 2. Cycle tests of a Grade 1 are double that of a Grade 2. Vertical load and bolt strength factors are similarly greater in a Grade 1 than a Grade 2.
Grade 1 rated hardware should be used in schools, factories, and institutions where long hardware life and optimal security are the criteria. Grade 2 rated hardware can be used in less demanding applications such as office or commercial rental properties.
Use the wrong hardware and you just might end up in a class all by yourself – and be poorer for it.