A hardware reference guide from CDF Distributors
This guide answers: What do ANSI Grade 1, Grade 2, and Grade 3 mean for door hardware?
What Are ANSI/BHMA Grades?
The American National Standards Institute (ANSI) and the Builders Hardware Manufacturers Association (BHMA) jointly publish performance standards for door hardware. These standards define three grades — Grade 1, Grade 2, and Grade 3 — based on durability, strength, and cycle testing. The grades apply to locks, closers, hinges, exit devices, and other door hardware components.
Grade 1 — Heavy Duty Commercial
Grade 1 is the highest performance level. Hardware rated Grade 1 has passed the most stringent cycle, strength, and security tests.
- Locks: Tested to 800,000 cycles (open/close operations)
- Closers: Tested to 2,000,000 cycles with 10 million cycle options available
- Hinges: Tested to 1,500,000 cycles
- Best for: High-traffic commercial buildings, hospitals, schools, government buildings, and any application where security and durability are critical
Most building codes require Grade 1 hardware for commercial and institutional applications. Specifying Grade 1 ensures the hardware can withstand the demands of heavy daily use over a 7 to 10 year service life.
Grade 2 — Light to Medium Commercial
- Locks: Tested to 400,000 cycles
- Closers: Tested to 500,000 to 1,000,000 cycles
- Hinges: Tested to 750,000 cycles
- Best for: Light commercial applications (interior office doors, storage rooms), upscale residential
Grade 2 hardware offers a balance of performance and cost. It is appropriate for interior doors with moderate traffic but is not recommended for exterior doors, high-security applications, or doors with high daily cycle counts.
Grade 3 — Residential
- Locks: Tested to 200,000 cycles
- Best for: Residential applications only
Grade 3 hardware is not appropriate for commercial installations. Building codes generally prohibit Grade 3 hardware in commercial occupancies. CDF supplies Grade 1 and Grade 2 hardware for commercial applications.
How Grade Affects Specification
When specifying hardware for a commercial project, the following factors determine the appropriate grade:
- Code requirements — IBC and local codes specify minimum hardware grades by occupancy type
- Traffic volume — High-traffic entries need Grade 1; low-traffic interior doors may use Grade 2
- Security requirements — Grade 1 locks provide higher resistance to forced entry
- Fire rating — Fire-rated assemblies typically require Grade 1 hardware listed for the specific fire rating
CDF's ProBuilder tool filters hardware options by grade, ensuring that only code-compliant hardware appears for the selected application.
A Note on Fire-Rated Assemblies
Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. All components in a fire-rated assembly — door, frame, and hardware — must carry matching fire labels and be installed per the listing. Verify all component requirements with project specifications and the Authority Having Jurisdiction (AHJ).
Configure Your Door Assembly
CDF's ProBuilder tool allows contractors and facility managers to configure complete door, frame, and hardware assemblies online. ProBuilder displays compatible options and provides instant pricing.
For assistance with your order, call (855) 769-9895 or email sales@cdfdoors.com. CDF's sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.
Frequently Asked Questions
Is Grade 1 always required for commercial doors?
Not always. Interior doors with low traffic in commercial buildings may use Grade 2 hardware if permitted by the local building code. However, all exterior doors, exit doors, and doors in high-traffic areas should use Grade 1. When in doubt, specify Grade 1 — the cost difference is minimal relative to the durability benefit.
How do I verify a lock's ANSI grade?
Look for the BHMA/ANSI certification label on the hardware packaging or the manufacturer's specification sheet. The grade (1, 2, or 3) is listed along with the applicable standard number (e.g., ANSI/BHMA A156.2 for locks). Certified hardware is listed in the BHMA Product Certification Directory.
Can I mix Grade 1 and Grade 2 hardware on the same door?
Technically yes, but the door assembly's overall security is limited by the weakest component. For code compliance, all hardware on a fire-rated or high-security door should be Grade 1. Mixing grades is acceptable on non-rated interior doors where cost savings justify using Grade 2 for lower-stress components.
About CDF Distributors
CDF Distributors is a commercial door, frame, and hardware distributor headquartered in Nashville, Tennessee. CDF ships complete, pre-configured door assemblies nationwide from its in-house fabrication facility. Configure your assembly online at cdfdistributors.com using ProBuilder, or contact CDF at (855) 769-9895 or sales@cdfdoors.com.
