EN 356 is a European Standard for glazing to withstand an intruder attack, it has two resistance levels, the lower levels, P1A – P5A, also use the drop test but the higher resistance levels test using a hydraulically driven hammer and axe head, to replicate an actual attack. The higher resistance levels are P6B, P7B and P8B which require the samples to withstand 30/50, 51,70 or 71+ sledge hammer and axe blows respectively, before a 400mm square aperture is created.
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