Specialist Transport

Wednesday, February 2021

When is specialist transport required?

In UK specialist transport is required when a load becomes ‘Abnormal’. An abnormal load is defined as a load that cannot be divided into two or more pieces without undue expense and cannot be carried on a normal Construction and Use (C&U) when a vehicle is any of the following:
  • A weight of more than 44,000kg (This includes, Truck, Trailer and Load)
  • An axle load of more than 10,000kg for a single non-driving axle and 11,500kg for a single driving axle
  • A width of more than 2.9 meters
  • A rigid length of more than 18.65 meters

What’s required to move specialist transport?

With large, heavy transports there is a real risk of damaging the road, bridges or buildings if they are not handled correctly. Which makes it fundamental to use a hauler that understand the legislation with an expertise to handle the logistics.


It is always good practice to operate STGO combinations with both driver and attendant. The STGO requires attendants if the vehicle is over 18,75m long (or the combination is over 25,9m long), over 3,5m wide and if the forward projection exceeds 2m and/or rear projection exceeds 3m.


STGO sign should be fitted vertically on the front of the vehicle, displaying the STGO category your load comes under.

Convoi Exceptionnel sign should be fitted vertically to the front of the vehicle.

Projection markers must be displayed with one visible to the front and one visible to the rear of the vehicle. They must be displayed at the point where the width is at its greatest is clearly visible at the front, middle rear and sides.

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