FB Rating Explained for Bullet Proof Doors
Understanding FB ratings is crucial for selecting the right bullet proof door for your security needs. These ratings indicate the level of ballistic protection provided.
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Overview
The FB rating system is the European standard for classifying bullet resistant doors according to EN 1522. Each class is tested against a specified weapon type, calibre, and velocity. TDS supplies certified doorsets from FB4 to FB7.
FB Rating Levels
| Class | Weapon type | Calibre | Ammunition | Velocity (m/s) |
|---|---|---|---|---|
| FB1 | Rifle | .22 LR | Lead, round nose | 360 |
| FB2 | Automatic pistol | 9 mm Luger | FJ / soft core | 400 |
| FB3 | Handgun | .357 Magnum | FJ / soft core | 430 |
| FB4 | Handgun | .44 Rem Magnum | FJ / soft core | 440 |
| *AK47 | Automatic rifle | 7.62×39 | FJ / soft core | 700 |
| FB5 | Assault rifle | 5.56×45 | FJ / steel core | 950 |
| FB6 | Rifle | 7.62×51 | FJ / soft core | 830 |
| FB7 | Rifle | 7.62×51 AP | Steel hard core | 820 |
*AK47 is an additional test class (7.62×39), not part of the numbered FB1–FB7 sequence. Matching BR glass classes under EN 1063 use the same calibres as the corresponding FB class.
Testing Requirements
Each FB rating requires specific testing procedures:
- Multiple shots at different points on the door
- Testing at specified distances
- Verification of no penetration
- Assessment of spall (fragmentation)
- Testing of door frame and hardware
- Verification of door operation after testing
Additional Classifications
Spall Protection
- SP1: Basic spall protection
- SP2: Enhanced spall protection
- SP3: Maximum spall protection
Edge Protection
- EP1: Basic edge protection
- EP2: Enhanced edge protection
- EP3: Maximum edge protection
Selection Guidelines
Consider these factors when selecting an FB rating:
- Risk Assessment: Evaluate potential threats
- Location: Consider geographical risk factors
- Building Type: Match protection to facility security needs
- Budget: Higher ratings increase costs significantly
- Maintenance: Higher ratings may require more maintenance
- Weight: Higher ratings increase door weight
Important Note:
Understanding FB ratings is essential for selecting the appropriate level of ballistic protection for your security needs.
Explore Our Bullet Proof Security Doors
Discover our range of bullet proof security doors with certified FB ratings and superior protection.