Document ID: chunk:federal_register_of_legislation:F2007C00494:body:0:p5
Version: federal_register_of_legislation:F2007C00494
Segment Type: other
Provision Reference: 
Character Range: 14160–17246

and shall have a capacity to tow trailer of 3.5 tonnes 'ATM'.
12.3.2.1.                    the following separately applied static forces:
12.3.2.1.1.              longitudinal tension and compression of 86 kN; and
12.3.2.1.2.              vertical tension and compression of 35 kN; and
12.3.2.1.3.              transverse tension and compression of 35 kN.
12.3.2.2.                    A minimum horizontal alternating force of ± 12 kN acting in a line parallel to the ground and in the longitudinal median plane of the towing vehicle passing through the centre of the 'Coupling' applied for 2 million cycles. The frequency of the longitudinal forces not to exceed 35 Hz, but must be chosen not to coincide with any natural frequency of the system.
12.3.3.                          'Couplings' specially designed for use between towing vehicles and trailers over 3.5 tonnes 'ATM' when installed in the design configuration must withstand the test requirements as per either clause 12.3.3.1 or clause 12.3.3.2 without either incurring any residual deformation that would interfere or degrade the function of the assembly or any breaks, cracks or separation of components.
12.3.3.1.                    'D-value' rated Dynamic Test Requirements
12.3.3.1.1.              A minimum horizontal alternating force of (± 0.6 x 'Couplings'' D-value' ) acting in a line parallel to the ground and in the longitudinal median plane of the towing vehicle passing through the centre of the 'Coupling' applied for 2 million cycles. The frequency of the longitudinal forces not to exceed 35 Hz, but must be chosen not to coincide with any natural frequency of the system.
12.3.3.2.                    'D and V-value' rated Dynamic Test Requirements
12.3.3.2.1.              A minimum horizontal alternating force of (± 0.6 x 'Coupling'
'D-value') acting in the longitudinal axis of the 'Coupling' and a minimum vertical alternating force of ( static vertical coupling load ± 0.6 x 'Coupling' 'V-value' ) in the vertical axis of the 'Coupling' applied through the 'Coupling' centre asynchronously for 2 million cycles each.
Static vertical load in kN = g x S
where:
g = acceleration due to gravity (assumed to be 9.81 m/sec2)
S = vertical load in tonnes ('ATM' - 'GTM')
12.3.3.2.2.              The vertical and horizontal components shall be sinusoidal in shape and shall be applied asynchronously where the difference of their frequencies shall be between 1 % and 3 % and not exceed 35 Hz, but must be chosen not to coincide with any natural frequency of the system.
12.4.                                Marking Requirements
12.4.1.                          Both parts of the 'Coupling' specially designed for use between LA, LB, LC, LD category and LEM sub category towing vehicles and trailers up to 750 Kg 'ATM' must comply with the following marking requirements:
12.4.1.1.                    the 'Coupling' manufacturer's name or trademark; and
12.4.1.2.                    "750 kg" (ie the maximum allowable trailer 'ATM' for which the 'Coupling' is rated),
12.4.1.3.                    the words