EN 356

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BS EN 356 Intruder Resistance

Testing and Classification of resistance against Manual Attack

 

The Lower Resistance Level

This level represents a manual attack using a blunt instrument such as a hammer.

The test comprises dropping a 100mm steel ball (4.11kg) from various heights.

To pass the test the ball must not penetrate the glass.

 

BS EN 356

Drop Height

mm

No of Strikes

Impact energy Per Stroke

Glass Thickness

P1A

1500

3 in a triangle

62J

6.8mm

P2A

3000

3 in a triangle

123J

8.8mm

P3A

6000

3 in a triangle

247J

9.1mm

P4A

9000

3 in a triangle

370J

9.5mm

P5A

9000

3 x 3 in a triangle

370J

10.3mm

 

The Higher Resistance Level

This level represents a more sustained assault with Hammer and Axe blows.

The test comprises;

A hydraulically driven hammer head 40mm square weighing 2kg, initially

 being used to destroy the glass face with a min of 12 blows.

A 2kg axe head hitting the same sample a min 12 blows with the intention

of cutting a 400mm square hole.

 

Each blow is delivered with exactly the same energy with the axe head sharpened every ten blows.

Samples are classified by the number of blows required to cut the 400mm square.

 

BS EN 356

Sledge + Axe

 

Thickness 

Construction

P6B

31

15mm

10mm

Glass PVB

Glass Poly Glass

P7B

51

28mm

16mm

Glass PVB

Glass Poly Glass

P8B

71

26mm

18mm

Glass PVB

Glass Poly Glass

 

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