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World Rugby Handbook

REGULATION 12 SCHEDULE 1 The impact zones will be: Once, where crown padding is provided. Twice where forehead padding is provided. Twice where temple padding is provided. Figure 5. Impact locations on Headgear 4.3.5 Calculations Maximum acceleration The maximum peak acceleration is calculated by measuring the perpendicular distance to the trace baseline from the midpoint of the resultant trace at maximum excursion and multiplying by the sensitivity factor. The sensitivity factor is defined as g per division deflection of the trace. 4.3.6 Duration of Impulse Determine the duration of the pulse by measuring the total width of the trace along the 150g line in milliseconds. 4.4 Retention System Testing – Strength 4.4.1 Principle The chin strap of the headgear is subjected to two loads. The first a static load of 7 kg to which the strap will not open or break. The second is an additional load which falls dynamically to apply a sudden downward load causing the strap to open or break. Last update: 14 January, 2015 201


World Rugby Handbook
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