Division 3.2.1.3 Requirement relating to tests of category R3, R4 or S2 vehicles
United Kingdom
The sum of the forces exerted at the periphery of the braked wheels shall be at least X % of the maximum stationary wheel load.
50 for towed vehicle of categories R3, R4 and S2 with a maximum design speed exceeding 30 km/h
35 for towed vehicles of categories R3a, R4a and S2a with a maximum design speed not exceeding 30 km/h
Where the towed vehicle is fitted with a compressed-air braking system, the pressure in the control line shall not exceed 650 kPa and the pressure in the supply line shall not exceed 700 kPa during the brake test.
F1The test speed is 60 km/h or the maximum design speed of the towed vehicle, whichever is the lower.
Where the towed vehicle is fitted with a hydraulic braking system, the pressure in the control line shall not exceed 11 500 kPa and the pressure in the supplementary line shall be between 1 500 kPa and 1 800 kPa during the brake test.