Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p5
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 13431–16643

the braking force can be progressively increased and decreased by means of the 'Control Signal' from the towing vehicle.

38.2.2.2.                    The combined total energy capacity of energy storage devices incorporated into the 'Service Brake System' shall be not less than 8 times the combined maximum energy capacity of the service brakes actuating devices. In the case of compressed air 'Braking Systems', the ratio of air reservoir volume to actuator volume will be taken as being the ratio of energy capacity.

38.2.2.3.                    The elapsed time, as measured in accordance with the procedure specified in clause 38.3.11 for measuring brake actuation time response shall not exceed in the case of:

            (a)  any brake actuator of any 'Axle Group' on the trailer, 0.35 seconds; and

            (b)  any trailer or dolly rear service coupling for towed trailers, 0.25 seconds.

38.2.2.4.                    The elapsed time, as measured in accordance with the procedure specified in clause 38.3.11 for measuring brake release time, shall not exceed in the case of:

38.2.2.4.1.              the brake actuator on any trailer, 0.65 seconds; and

38.2.2.4.2.              any, trailer or dolly, rear service coupling for towed trailers, 0.55 seconds.

38.2.2.5.                    Each 'Axle' in the 'Service Brake System' shall have an individual 'GALR' not less than

     'Total Trailer Axle' Load at 'GTM'   Brake torque rating of individual 'Axle'
        Total brake torque rating of all 'Axles'

'Axle' torque rating shall be determined according to clause 38.3.3 (Service Brake Effectiveness) and the fade performance according to clause 38.3.4 (Service Brake Fade Effectiveness).

38.2.2.6.                    The 'Established Retardation Coefficient's' of the 'Service Brake System' shall be between the upper and lower bounds of Figure 1 (Service Brake Effectiveness Requirement) when tested according to clause 38.3.3 (Service Brake Effectiveness).

38.2.2.7.                    Where a trailer is fitted with a 'Variable Proportioning Brake System' it shall meet the requirements of clause 38.2.2.6 with the brake proportioning device/s set in the 'LTM' position.

38.2.2.8.                    Notwithstanding clause 38.2.2.6 where a trailer is fitted with an 'Antilock System', the 'ERCs' need only exceed the lower bound described in Figure 1.

38.2.3.                          'Emergency Brake System'

38.2.3.1.                    The 'Emergency Brake System' may utilise parts of the 'Service Brake System' on the condition that any one failure of a 'Brake Device' in the 'Service Brake System' does not prevent the 'Emergency Brake System' from achieving its performance requirement. For the purpose of this clause, the 'Brakes' and any mechanical linkage connected directly thereto, shall be considered as not subject to failure.

38.2.3.2.                    The 'Established Retardation Co-efficient' of the 'Emergency Brake System' shall be shown to be not less than 0.18 according to the requirements and limitations of clause 38.3.5. ('Emergency Brake System'). The 'Brakes' force required to obtain an 'ERC' of 0.18 shall be able to be sustained