Document ID: chunk:federal_register_of_legislation:F2010C00153:body:0:p12
Version: federal_register_of_legislation:F2010C00153
Segment Type: other
Provision Reference: 
Character Range: 35082–38334

be located as near as practicable to the 'Coupling'. Where two points of attachment are required they must be mounted one on either side of the centreline of the 'Drawbar'.
14.4.2.                          Any safety chain attachment point affixing a safety chain to a 'Drawbar' must withstand at least the following forces, separately applied, without incurring either any residual deformation that would interfere or degrade the function of the assembly or any breaks, cracks or separation of the components. The static forces must be maintained for not less than 10 seconds:
14.4.2.1.                    Longitudinal tension (N) = 9.81 x 'ATM' (kg); and
14.4.2.2.                    vertical tension (N) = 0.5 x 9.81 x 'ATM' (kg).
15.                                      ALTERNATIVE STANDARDS
15.1.                                The technical requirements of ECE Regulation No. 55/01 Uniform Provisions Concerning the Approval of Mechanical Coupling Components of Combinations of Vehicles shall be deemed to be equivalent to the technical requirements of this standard as applicable to:
15.1.1.                          Class G50 standard 50 mm pin diameter fifth wheel couplings and class H fifth wheel coupling pins, 50 mm diameter;
15.1.2.                          Class G50-X  non-standard 50 mm pin diameter fifth wheel couplings if the manufacturer can demonstrate that they can be reliably coupled to class H fifth wheel coupling pins, 50 mm diameter;
15.1.3.                          Class H50-X non-standard 50 mm pin diameter fifth wheel coupling pins if the manufacturer can demonstrate that they can be reliably coupled to class G50 standard 50 mm pin diameter fifth wheel couplings;
15.1.4.                          Class C drawbar couplings with a 50 mm diameter pin and class D drawbar eyes having a parallel hole suitable for a 50 mm diameter pin;
15.1.5.                          Class A50-1 to A 50-5 standard 50 mm coupling balls with flange type bolted fixing;
15.1.6.                          Class A50-X non-standard 50 mm coupling balls and brackets if the manufacturer can demonstrate that they can be reliably coupled to class B coupling heads fitted to the drawbar of trailers for connecting to the 50 mm diameter coupling ball;
15.1.7.                          Class B coupling heads fitted to the drawbar of trailers for connecting to the 50 mm diameter coupling ball, but excluding class B50-X, non-standard 50 mm diameter coupling heads;
15.1.8.                          Class B50-X non-standard 50 mm diameter coupling heads if the manufacturer can demonstrate that they can be reliably coupled to class A coupling balls and towing brackets employing a 50 mm diameter spherical device;
15.1.9.                          Classes KA1, KA2 or KA3 hook type couplings;
15.1.10.                      Classes L1, L2, L3, L4 or L5 toroidal drawbar eyes;
15.1.11.                      Class E drawbars, but excluding their installation.

APPENDIX 1
        Dimensional Requirements for 'Hook Couplings'
        Refer Clause 11.6
The following has been reproduced from ECE Regulation No. 55/01 Uniform Provisions Concerning the Approval of Mechanical Coupling Components of Combinations of Vehicles, incorporating Corrigendum