# The Noise Emission in the Environment by Equipment for use Outdoors Regulations 2001, Paragraph 28: Hydraulic hammer


Equipment which uses the hydraulic power source of the carrier machine to accelerate a piston (sometimes gas-assisted), which then hits a tool. The stress wave generated by kinetic action flows through the tool into the material, which causes the material to break. Hydraulic hammers need a supply of pressurised oil to function. The complete carrier/hammer unit is controlled by an operator, usually seated in the cabin of the carrier.

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Source: https://www.legislation.gov.uk/uksi/2001/1701/schedule/4/paragraph/28 (the official version)
Page: https://openlegislation.uk/noise-emission-in-the-environment-by-equipment-for-use-outdoors-regulations-2001/schedule-4/paragraph-28
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.