Document ID: chunk:federal_register_of_legislation:F2006L03054:body:0:p4
Version: federal_register_of_legislation:F2006L03054
Segment Type: other
Provision Reference: 
Character Range: 11872–15060

a dynamic oscillating force of ± 0.6  'D-value' for 2 million cycles. The frequency during testing not to exceed 10 Hz, but must be chosen not to coincide with the natural frequency of the system.
5.3.6.3.                        Hook 'Couplings' and towing eyes must be marked with the manufacturer's name or trademark and the rated 'D-value'
5.3.7.                              The installer of all 'Couplings' fitted to ME, NC, TC and TD category vehicles must be identified by means of a plate. The information provided must contain the installer's name and address in the English language in block letters and numerals which must not be less than 2.5 mm in height.
6.                                          TOWBAR REQUIREMENTS

         6.0. The requirements of this Section do not apply to connection devices mounted at the front of a motor vehicle or devices not intended for towing trailers.

6.1.                                    Strength Requirements
The vehicle structure including the 'Towbar' must either:
6.1.1.                              be able to withstand the following forces applied at the intended 'Coupling' centreline without any residual deformation that would interfere with or degrade the function of the assembly, nor must there be any breaks, cracks, or separation of components:
6.1.1.1.                        In the case of ME, NB and NC category vehicles:
6.1.1.1.1.                  longitudinal tension and compression 1.6 × 'Coupling' 'D-value' required for use with the 'Aggregate Trailer Mass' marked on the 'Towbar' according to clause 6.3.1.3; or
6.1.1.1.2.                  a dynamic oscillating force of ± 0.6 × 'Coupling' 'D-value' required for use with the 'Aggregate Trailer Mass' marked on the 'Towbar' according to clause 6.3.1.3 for 2 million cycles. The frequency not to exceed 10 Hz but must be chosen not to coincide with the natural frequency of the system.
6.1.1.2.                        In the case of L group, MA, MB, MC, MD and NA category vehicles:
6.1.1.2.1.                  longitudinal tension and compression l.5 × the 'Towbar's' rated capacity;
6.1.1.2.2.                  transverse thrust 0.5 × the 'Towbar's' rated capacity; and
6.1.1.2.3.                  vertical tension and compression 0.5 × the 'Towbar's' rated capacity; or
6.1.2.                              comply with AS 4177.1-1994 for vehicles equipped with 'Towbars' designed for towing TA and TB category trailers.
6.2.                                    Safety Chain Attachments
The 'Towbar' must be fitted with safety chain attachments to withstand the loads imposed. Vehicles having a towing capacity (i.e. the 'Aggregate Trailer Mass' for which the towing vehicle is designed) of 2.5 tonnes or more must be fitted with 2 safety chain attachments mounted one on either side of, and adjacent to, the tow 'Coupling'.
6.2.1.                              To establish the strength of the attachments provided on the 'Towbar' for the safety chain(s), each attachment including the safety chain(s) must withstand the following forces without any residual deformation that must interfere with or degrade the function of the assembly, nor shall there be any