Document ID: chunk:federal_register_of_legislation:F2025C00113:front:0:p8
Version: federal_register_of_legislation:F2025C00113
Segment Type: other
Provision Reference: 
Character Range: 22106–25185

rotate the wheels; and
             3.           Gradually increasing the 'Control Signal' (measured at the 'Control Line' coupling) until the total torque required to begin to rotate the wheels/hubs of at least one 'Axle' in each 'Axle Group', reaches the lesser of:
 1.             100 N.m; or
 1.             1 per cent of the product of the static vertical load (N) on the 'Axle' concerned and the rolling radius of the tyres (m) fitted to the wheels, at 'UTM'.
1.                               Each 'Unique' trailer 'Service Brake System' must be shown by either testing in accordance with clauses 10 and 11, or by calculation based on data for 'Approved' components in accordance with clause 17, to have 'Established Retardation Coefficients' between the 'Upper Boundary' and the 'Lower Boundary' of:
             1.           Figure 1 when fully laden; and
             2.           For trailers not equipped with an 'Antilock System' (only where permitted by clause 7.2.1.1), but fitted with a 'Variable Proportioning Brake System', Figure 2 when at 'UTM', and progressively between Figure 2 and Figure 1 for intermediate states of load.
             1.                         The requirements specified in this clause are applicable for trailers equipped with a pneumatic 'Control Line', as well as for trailers with an additional electric 'Control Line'.  In both cases, the reference value (horizontal coordinate of the figure) will be the value of the transmitted pressure in the 'Control Line':
             1.           For a pneumatic 'Control Line', this will be the actual pneumatic pressure in the 'Control Line';
             2.           In the case of an additional electric 'Control Line', this will be the pressure corresponding to the transmitted digital demand value in the electric 'Control Line', according to ISO 11992:2003 including ISO 11992‑2:2003 and its Amd.1:2007.
 Trailers equipped with both pneumatic and electric 'Control Lines' must satisfy the requirements of this clause for each 'Control Line'.  However, identical braking characteristic curves are not required for each of these 'Control Lines'.
 1.                         'Established Retardation Coefficients' may be determined by calculation for intermediate states of load between 'UTM' and fully laden.  These calculations must include not less than 5 points and include any critical point.
 2.                         The 'Upper Boundary' of Figure 2 may be increased by up to 40 per cent in the case of a trailer with a 'Variable Proportioning Brake System', which can be set to achieve a retardation response between the conventional 'Upper Boundary' and the 'Lower Boundary' of Figure 2, but is adjusted to allow for the braking responses of particular towing vehicles not equipped with a 'Variable Proportioning Brake System'.
 1.                               Each 'Unique' trailer 'Service Brake System' must be shown by either testing in accordance with clauses 10 and 13 or by the calculation based on data for 'Approved' components in accordance with clause 18, to meet