Understanding Lock Grades: ANSI/BHMA Ratings Explained
When shopping for locks, you'll see ANSI Grade 1, 2, and 3 ratings. Here's exactly what these grades mean and which one you need for your doors.
What Are Lock Grades?
The American National Standards Institute (ANSI) and Builders Hardware Manufacturers Association (BHMA) jointly developed a rating system for residential and commercial door hardware. These ratings help consumers and contractors select hardware appropriate for each application.
The Three Grade Levels
Grade 1 — Highest Security
ANSI Grade 1 locks are tested to withstand:
- 250,000 open/close cycles
- A 360 lb. force deadbolt test
- 6 strikes with a 75 lb. weight
This is the gold standard for exterior residential doors and all commercial applications. If you want the best protection for your front door, Grade 1 is the minimum you should consider.
Grade 2 — Residential Standard
Grade 2 locks are tested to:
- 150,000 open/close cycles
- A 250 lb. force deadbolt test
- 4 strikes with a 75 lb. weight
These are the most commonly found locks on residential doors across Utah neighborhoods. They provide decent security for interior doors and lower-risk exterior doors.
Grade 3 — Minimal Security
Grade 3 locks are tested to:
- 100,000 open/close cycles
- A 150 lb. force deadbolt test
- 2 strikes with a 75 lb. weight
Grade 3 hardware should only be used on interior doors with very low security needs.
How to Find a Lock's Grade
Reputable lock manufacturers list the ANSI grade on the product packaging and on their website. When in doubt, ask a professional locksmith.
Our Recommendation
For all exterior doors in Utah homes, we recommend ANSI Grade 1 deadbolts, paired with reinforced strike plates and 3-inch screws. Contact Provo Locksmith UT at (385) 283-6134 for professional guidance and installation.