What Are Bullet-Resistant Levels in Security Glass?

When it comes to protecting high-risk environments such as banks, embassies, government buildings, and critical infrastructure, bullet-resistant glass is an essential security component. But not all bullet-resistant glass is created equal. The level of protection it provides depends on its classification, commonly referred to as Bullet-Resistant (BR) Levels. These levels are defined by international standards like UL 752 (Underwriters Laboratories) and EN 1063 (European Norms).

Understanding these levels is crucial for selecting the right type of bullet-resistant glass for your project. Here’s an in-depth look at what BR levels mean and how they are categorized.

Defining Bullet-Resistant Levels

BR levels classify security glass based on its ability to withstand specific types of firearms and ammunition. These levels range from protection against low-caliber handgun rounds to high-velocity rifle ammunition. The glass undergoes rigorous ballistic testing to determine its level, ensuring that it meets the required safety standards.

Key BR Levels and Their Classifications

1. BR1 (Low-Caliber Handguns):

1. Protects against small-caliber bullets, such as .22 LR or 9mm rounds.
2. Suitable for environments with lower threats, like residential spaces or low-risk commercial properties.

2. BR2 (Medium-Caliber Handguns):

1. Designed to stop bullets from larger handguns, such as .357 Magnum.
2. Commonly used in retail stores, offices, and other public-facing spaces.

3. BR3 (High-Caliber Handguns):

1. Provides protection against more powerful handgun rounds, such as .44 Magnum.
2. Often installed in banks, jewelry stores, and other high-value establishments.

4. BR4 (Low-Powered Rifles):

1. Resists bullets from low-powered rifles, such as .223 caliber rounds.
2. Ideal for moderately high-security zones like data centers and VIP facilities.

5. BR5 (High-Powered Rifles):

1. Protects against high-powered rifle ammunition, such as 7.62mm NATO rounds.
2. Commonly used in government buildings, embassies, and high-risk zones.

6. BR6 (Armor-Piercing Rounds):

1. Capable of stopping armor-piercing bullets fired from rifles.
2. Used in military installations, airports, and other critical infrastructure.

7. BR7 (Advanced Threats):

1. Provides the highest level of protection, including multiple hits from armor-piercing rounds.
2. Installed in high-security environments like nuclear facilities and sensitive government facilities.

How Are BR Levels Tested?

The testing process for bullet-resistant glass involves firing specific types of ammunition at the glass under controlled conditions. The test measures:

• Penetration Resistance: Ensuring the bullet does not pass through the glass.
• Spall Behavior: Ensuring minimal fragmentation on the opposite side of the glass to protect occupants.
• Multiple Shot Resistance: Assessing the ability of the glass to withstand repeated impacts without failure.

Factors to Consider When Choosing BR Levels

When selecting bullet-resistant glass for your project, consider the following:

1. Threat Assessment: What types of weapons and ammunition are most likely to be used in the area?
2. Application Environment: Is the glass being installed in a low, medium, or high-risk location?
3. Weight and Thickness: Higher BR levels often mean thicker, heavier glass, which can impact installation requirements.
4. Spall or Non-Spall: Non-spall options prevent glass fragments from ejecting, enhancing occupant safety.

Applications of Bullet-Resistant Glass by BR Levels

• BR1–BR3: Residential properties, retail stores, and offices.
• BR4–BR5: Banks, high-value commercial spaces, and data centers.
• BR6–BR7: Embassies, military facilities, airports, and critical infrastructure.

Choosing the correct BR level is a critical step in ensuring safety and security in high-risk environments. Each level offers unique capabilities tailored to specific threat levels, making it essential to assess your project’s needs carefully.

At FG, we specialize in providing customized bullet-resistant glass solutions tested to the highest international standards. Our expertise ensures that you get the right balance of safety, functionality, and aesthetics for your project. Reach out to us today to discuss your security glass requirements and let FG be your trusted partner in safety and innovation!