# The Road Vehicles (Authorisation of Special Types) (General) Order 2003, Paragraph 17

Extent: E+W+S

(1) The gross weight of engineering plant, together with the weight of any load carried on it in accordance with this Schedule, must not exceed 150,000 kilograms.
(2) The weight of the plant is to be calculated—
(a) in the case of plant which is a motor vehicle, by taking the sum of the weights transmitted to the road surface by all the wheels and tracks of the vehicle;
(b) in the case of plant which is a trailer, by taking the sum of the weights transmitted to the road surface by all the wheels and tracks of the trailer and of any weight of the trailer imposed on the towing vehicle.

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Source: https://www.legislation.gov.uk/uksi/2003/1998/schedule/3/paragraph/17 (the official version)
Page: https://openlegislation.uk/road-vehicles-authorisation-of-special-types-general-order-2003/schedule-3/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.