Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p14
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 38521–41290

at an average rate of 2.75 m/s2 from 80 km/h to 24 km/h at equal intervals of 72 seconds, and shall be capable of decelerating to a stop from 32 km/h at an average deceleration rate of 4.25 m/s2 one minute after the 10th deceleration. The series of decelerations shall be conducted as follows.

38.3.10.1.1.          With an initial brake temperature between 65 and 95 Celsius for the first brake application, and the drum or disc rotating at a speed equivalent to 80 km/h, apply the brake and decelerate at an average deceleration rate of 2.75 m/s2 to 24 km/h. Upon reaching 24 km/h accelerate to 80 km/h and apply the brake for a second time 72 seconds after the start of the first application. Repeat the cycle until 10 decelerations have been made. The service line air pressure shall not exceed 690 kPa during any deceleration.

38.3.10.1.2.          One minute after the end of the last deceleration required by clause 38.3.10.1.1 and with the drum or disc rotating at a speed of 32 km/h decelerate to a stop at an average deceleration rate of 4.25 m/s2.

38.3.10.2.                Starting 2 minutes after completing the tests required by clause 38.3.10.1 the brake shall be capable of making 20 consecutive stops from 48 km/h at an average deceleration rate of 3.65 m/s2 at equal intervals of one minute measured from the start of each brake application.  The service line air pressure needed to attain a rate of 3.65 m/s2 shall be not more than 586 kPa and not less than 137 kPa for a brake not subject to the control of an 'Antilock System', or 82 kPa for a brake subject to the control of an 'Antilock System'.

38.3.11.                      Time Response Measurement

38.3.11.1.                Except where hydraulic brakes are used, each 'Unique' trailer 'Brake System' shall be shown to meet the requirements of clause 38.2.2.3 (actuation time) and clause 38.2.2.4 (release time) by testing in accordance with clause 38.3.11.3 or on the basis of a calculation in accordance with clause 38.4.5 (time response calculation).

38.3.11.2.                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:

            (a)  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.

            (b)  Entire subsections of the 'Brake System' have been removed, as would be the case in converting a modular three 'Axle' system to a modular two 'Axle' system, such that the effect if any is to slightly increase the energy flow