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 (J)

P1A

1500

3 - in a triangle formation

62

P2A

3000

3 - in a triangle formation

123

P3A

6000

3 - in a triangle formation

247

P4A

9000

3 - in a triangle formation

370

P5A

9000

3 x 3 in a triangle formation

370

 

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

Sledgehammer & Axe Minimum Number of Blows Required

Constructions Available

P6B

31

Glass/PVB

 

 

Glass/Poly/Glass

P7B

51

Glass/PVB

 

 

Glass/Poly/Glass

P8B

71

Glass/PVB

 

 

Glass/Poly/Glass

 

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