BULLET RESISTANT GLASS LEVELS

BULLET RESISTANT GLASS LEVELS The European standard EN 1063 regulates the testing procedure for bullet-resistant glass in 9 different ballistic classes. The lowest ballistic class is BR1, the highest BR7. The classes SG1 and SG2 represent hunting shotguns.

The 4 lower ballistic classes (BR1 to BR4) represent weapons ranging from sporting rifles to pistols or revolvers. The ballistic classes above represents long weapons, such as the American M16 rifle or the NATO G36 and G3 rifles. These are weapons that are effective and precise at long distance.

The following table shows the weapons and ammunition types used for testing of bullet-resistant glass in accordance with EN 1063. Incidentally: the fastest projectile speed is 950 m/s. That's at least 3,400 km/h.

Resis tance class

Type

BR1

Gun

BR2

Calibre

Bullet

Test condition

Type

Mass [g] +/-1

Energy [Joule]

Shot distance [m] +/-0.5

Impact speed [m/s] +/-10

L/RN

2.6

168

10

360

Handgun 9 FJ1)/RN/SC mm Luge r

8.0

640

5

400

BR3

Handgun .357 FJ1)/CB/SC Magnum

10.2

943

5

430

BR4

Handgun .44 Rem. FJ2)/FN/SC Magnum

15.6

1,510

5

440

BR5

Gun

5.56 x 453)

4.0

1,805

10

950

BR6

Gun

7.62 x 51 FJ1)/PB/SC

9.5

3,272

10

830

BR7

Gun

7.62 x 514)

9.8

3,295

10

820

.22 LR

FJ2)/PB/SCP1

FJ2)/PB/HC1

SG1*

Shotgun

Shotgun Lead shotgun 1 shot5) 2/70

31

2,734

10

420

SG2** Shotgun

Shotgun Lead shotgun 1 shot5) 2/70

31

2,734

10

420

* 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)

Ballistic classes for bullet resistant Glass in accordance with EN 1063

Firing tests: In the firing tests in accordance with EN 1063, the bullet-resistant glass (500 x 500 mm) to be tested is fastened in a frame.

The panes receive 3 hits in the centre, each hit forming an equilateral triangle at a distance of 12 cm.

The angle of impact is 90° and the firing distance is 5m or 10m, depending on the resistance class.

The shot may not penetrate the bullet-resistant glass.

If no glass splinters emerge on the protective side, the ballistic class additionally receives the rating "no splinters" (NS= no splinters). If glass splinters emerge on the protected side of the impact-resistant glass, "Splinters" is added to the test result.

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