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Bullet resistant glass levels

Levels of bullet resistance are tested and classified according the internationally recognized EN 1063 standard. It regulates testing procedures for bullet-resistant glass (BR glass) in nine different classes, ranging from BR1 for projectiles fired from .22 caliber handguns to SG2 for high-powered hunting shotguns.

 

Resistance against powerful modern weapons

Ballistic classes BR5 to BR7 require testing with long weapons such as the American M16 rifle or the NATO G36 and G3 rifles. That means these classes provide protection from powerful weapons that are effective and precise at long distance. To qualify for BR5, for example, bulletproof glass must withstand the impact of a projectile traveling at 950 meters per second – over 3,400 km/h.

The following table shows the weapons and ammunition types used for testing bullet-resistant glass in accordance with EN 1063.

 

Ballistic classes for bullet resistant Glass in accordance with EN 1063
Resis
tance
class

Type

Calibre

Bullet

Test condition

TypeMass
[g]
+/-1
Energy
[Joule]
Shot
distance
[m]
+/-0.5
Impact
speed
[m/s]
+/-10
BR1Gun.22 LRL/RN2.616810360
BR2Handgun9 mm LugerFJ1)/RN/SC8.06405400
BR3Handgun.357 MagnumFJ1)/CB/SC10.29435430
BR4Handgun.44 Rem. MagnumFJ2)/FN/SC15.61,5105440
BR5Gun5.56 x 453)FJ2)/PB/SCP14.01,80510950
BR6Gun7.62 x 51FJ1)/PB/SC9.53,27210830
BR7Gun7.62 x 514)FJ2)/PB/HC19.83,29510820
SG1*ShotgunShotgun 12/70Lead shotgun shot5)312,73410420
SG2**ShotgunShotgun 12/70Lead shotgun shot5)312,73410420

* one shot, +/- 0.5 g, +/- 20 m/s
 ** three shots, +/- 0.5 g, +/- 20 m/s
1) Steel full metal jacket shot, plated
2) Tombac full metal jacket shot
3) Spin length 178 mm +/- 10 mm
4) Spin length 254 mm +/- 10 mm
5) Brenneke

L Lead
CB Conical bullet shot
FJ Full metal jacket shot
FN Flat-nosed bullet
HC1 Steel hard core, mass 3.7 g +/-0.1 g, Hardness larger than 63 HCR

PB Pointed bullet
RN Round-nose bullet
SC Soft-centre (lead)
SCP1 Soft-centre (lead) with steel penetrator (type SS109)

Rigorous test procedures

Firing tests in accordance with EN 1063 are conducted on a 500 x 500 mm sample of the bullet-resistant glass to be tested, secured in a frame. 

The pane is subjected to three shots in the center, forming an equilateral triangle with each side measuring 120 mm. The angle of impact is 90° and the firing distance is 5m or 10m, depending on the resistance class.



To qualify for a given ballistic class, the bullet-resistant glass must stop the projectile – penetration is a failure of the test.

If no glass splinters emerge on the protective side, the ballistic glass receives the additional rating NS (no splinters). If splintering does occur on the protected side of the impact-resistant glass, the word "splinters" is added to the test result.

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