REGULATION 12 SCHEDULE 1 3.4.3 Retention System Effectiveness When tested in accordance with the procedures specified in Section 4.5 the headgear may shift but not roll off the wearer’s head when initially subject to a static load of 3 kg followed by an additional dynamic load exerted by a 4 kg load falling through 175mm. 4. Test Methods and Procedures – Headgear 4.1 Sampling Three (3) test specimens of each size shall be submitted by Manufacturers, complete with ‘Information supplied by the Manufacturers’ (see section 9). Two specimens shall be used for impact attenuation testing at the various conditions and one for retention system testing. 4.2 Conditioning of Specimens Prior to impact testing, one specimen will be exposed to ambient conditions and another to high temperature conditions as follows: (i) Ambient Temperature - one sample is conditioned by exposing it to a temperature of 20°C +/- 2°C and relative humidity condition of rh60% +/- 5% for a period of between 4 and 24 hours. (ii) High Temperature - the second is conditioned by exposing it to a temperature of 50°C +/-2°C and relative humidity condition of rh60% +/- 5% for a period of between 4 and 24 hours. All testing shall be conducted within 5 minutes of removal from the conditioning environment. 4.3 Impact Attenuation Testing 4.3.1 Principle The headgear is mounted on the test headform so that the headform can be oriented in different positions and dropped onto a flat impact surface. The acceleration and time history of the impact are recorded using a triaxial accelerometer and appropriate instrumentation. Peak acceleration and time duration data obtained using the methods specified in Section 4.3.4 are used to determine the impact characteristics of the headgear. 4.3.2 Apparatus The apparatus for the impact attenuation test shall consist of the following (also see Figure 4): Headforms – All headforms used will be to EN 960, be of metal and have a low resonance frequency (but not lower than 3kHz). Anvil – the anvil shall consist of a flat steel surface of diameter 130mm +/-3mm and not have a resonance frequency liable to affect Last update: 3 January, 2017 221
World Rugby Handbook
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