what does grade mean

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Falcon 25 series is a ANSI/BHMA A156.3 Standard for Grade 1 device.
Falcon F-25 series is the UL Rated Fire Exit Hardware device is a ANSI/BHMA A156.3 Standard for Grade 1 device.
A copy of the BHMA Directory Listing can be viewed in the online Certified Directory on the BHMA web site. BHMA
The B250 is Grade 2 but has no UL listing due to the holdback rose.
The S200 as of January 1st 2011 is no longer a BHMA grade 2 lock.  We are continually improving our products to meet our customers expectations as such the CS200 product line will be replacing...
The AL lock is a Grade 2 lock ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 2, UL Listed for 3-hour fire door.
The B500 deadbolts meet the following certification: ANSI A156.5, 2001, Grade 2. Available UL Listed for 3-hour fire door.
The Schlage ND Series listing is: ANSI/ BHMA A156.2-2003 Grade 1
The fluid in an LCN closer must not be refilled in the field. See attached Warranty and Repair Communication 
The American National Standards Institute (ANSI) and Builders Hardware Manufacturers Association (BHMA) have developed durability, strength and performance standards for every type of door hardware...