Document ID: chunk:federal_register_of_legislation:F2014C01118:front:0:p20
Version: federal_register_of_legislation:F2014C01118
Segment Type: other
Provision Reference: 
Character Range: 58075–61924

test must be conducted using the General Test Conditions of part 9 and the generally in accordance with the particular conditions of part 10. Clause 10.2 need not be complied with.
21.4.2.6.                    The test result must be reported as the value of the indicated retardation force for each 'Axle' divided by the greatest of the 'Axle' retardation forces at which an 'Established Retardation Coefficient' of 0.45, calculated with 'Total Combination Mass' held equal to 'Gross Trailer Mass', can be achieved without wheel lock.
21.4.2.6.1.              In the case of 'S-Cam' air 'Brake Systems' the overall effect of changing actuator and slack adjuster sizes can be simulated by individually adjusting the air pressure to each 'Axle'.
22.                                      ALTERNATIVE STANDARDS
22.1.                                The technical requirements adopted by the United Nations – Economic Commission for Europe (UNECE) Regulation No. 13 – UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES OF CATEGORIES M, N AND O WITH REGARD TO BRAKING, incorporating any of the series of amendments from 05 to 10 shall be deemed to be equivalent to the technical requirements of this standard, provided that the requirements of clauses 6.7 and 8.2 are met and provided that, in the case of trailers, other than 'Pig Trailers' that are not 'Converter Dollies', designed for use in 'Road Trains' having a 'Gross Combination Mass' not exceeding 125 tonnes, the requirement of clause 6.4 is also met.
22.2.                                Computer simulation of the requirements of part 10 is allowed where the simulation is sufficiently sophisticated and has been  'Approved' on the basis of an adequate back to back comparison with physical test results.
22.3.                                For trailers not fitted with a 'Variable Proportioning Brake System', certification evidence for ADR 38/02 that has been 'Approved' at or before the date set out in clause 2 will be deemed to comply with this rule.

        TABLE 1
        GROUP 'AXLE LOAD' LIMITS

        Number of 'Axles'          Tyre Type "a" and                  Group 'Axle Load'
         in 'Axle Group'           Configuration                      Limit (tonnes)
        1
                                   S                                  6.0
                                   D                                  9.0
                                   W1                                 6.7
                                   W2                                 7.0
                                   D                                  10.0 (RFS)
        2
                                   S S                                11.0
                                   S D                                13.0
                                   W 1 W 1                            13.3
                                   D D                                16.5
                                   W2 W 2                             14
                                   DD                                 17.0 (RFS)
        3
                                   S S S                              15
                                   D D D                              20.0
                                   W1 W 1 W 1 or W 2 W 2 W 2          20.0
                                   DDD                                22.5 (RFS)

         Tyre Type "a":

         S Single tyre per wheel

         D Dual tyres per wheel

         W 1  ' Wide Single Tyre'  (375 to 450 mm width)

         W 2  ' Wide Single Tyre'  (over 450 mm width)

         RFS 'Road Friendly Suspension'

    Note: The relationship required by the diagram shall apply progressively for the intermediate states of loading between the laden (Figure 1) and the unladen (Figure 2) states and shall be