Document ID: chunk:federal_register_of_legislation:F2007C00493:front:0:p11
Version: federal_register_of_legislation:F2007C00493
Segment Type: other
Provision Reference: 
Character Range: 30916–33949

'Stored Energy' that are common to the 'Service Brake System', for the purposes of testing for compliance with the requirements of clause 14.1, the trailer energy storage devices must be charged to an energy level no greater than 0.05 'E' above the supply level determined for clause 6.5, or the energy storage device level if higher, at which the 'Emergency Brake System' commences to activate the 'Brakes'.
15.                                      PARKING BRAKE EFFECTIVENESS TEST
15.1.                                The 'Parking Brake System 38/...' must be able to meet the requirements of clause 9.6 for a 5 minute period in each direction with the force required to actuate the parking brake not exceeding 685 N in the case of a foot operated brake and not exceeding 590 N in the case of a hand operated brake.
15.1.1.                          The necessary longitudinal force will be considered to have been applied if the sum of the force applied to the trailer towing point and the force due to the effect of gravity on the laden trailer mass, in the direction parallel to the test surface and trailer longitudinal axis, is greater than 0.18 times the 'Aggregate Trailer Mass'.
15.1.2.                          Where the test involves a force depending on the slope of the test surface, the slope must not be less than 10 percent.
15.1.3.                          When the test involves the action of slope on the trailer or combination mass, and the towing vehicle remains connected, 1.5 percent of the towing vehicle mass must be subtracted from the other forces parallel to the test plane, to allow for rolling friction.
15.1.4.                          The test slope must be specified in terms of unit vertical per unit horizontal distance expressed as a percentage.
15.2.                                The 'Parking Brake System 38/...' must meet the requirements of clause 14.1 when the 'Foundation Brakes' geometry is such that a reversal of the required braking torque will not reduce the ability of the 'Parking Brake System 38/...' to generate the required braking torque.
16.                                      TIME RESPONSE MEASUREMENT
16.1.                                Except where hydraulic brakes are used, each 'Unique' trailer 'Brake System' must be shown to meet the requirements of clause 7.3 and 7.4 by testing in accordance with clause 16.3 or in accordance with part 21.
16.2.                                A variant of a 'Unique' trailer 'Brake System' will be considered to be identical in regard to time response, when the only variation from the 'Unique' 'Brake System' is one or more of the following:
16.2.1.                          Plumbing or energy transmission line lengths and number of fittings are reduced but other characteristics including diameter, material, type of connecting fittings and the characteristic transmission loss per unit length are not changed.
16.2.2.                          Entire subsections of the 'Brake System' have been removed, as would be the case in