Document ID: chunk:federal_register_of_legislation:F2007C00493:front:0:p20
Version: federal_register_of_legislation:F2007C00493
Segment Type: other
Provision Reference: 
Character Range: 56131–57801

slack adjuster sizes can be simulated by individually adjusting the air pressure to each 'Axle'.
22.4.2.7.                    To determine the 'Emergency Brake System' 'Skid Limit' a test repeating that prescribed in clause 22.4.2.3 must be conducted, but using brakes on those axles deemed to be fitted with an 'Emergency Brake System' and without having to meet 0.45 'ERC' . The 'Skid Limit' value must be specified as the dimensionless ratio D
Where D =  Indicated retardation force (N)
           9.81  Static 'Axle Load.'

         Where D is the maximum value achievable without wheel lock.

22.4.2.8.                    The 'Parking Brake System 38/...' 'Skid Limit' may either be determined by the test in clause 22.4.2.7 or by a test based on part 15. The 'Skid Limit' value must be specified as the dimensionless ratio D.
Where D =  Indicated retardation force (N)
           9.81  Static 'Axle Load.'

  Where D is the maximum value achievable without wheel lock.

23.                                      ALTERNATIVE STANDARDS
23.1.                                Trailers complying with ECE 13/05 will be taken as meeting the requirements of this rule so long as the requirements of clauses 6.5, 6.6, 6.10, 7.3, 7.4, 7.8, and 14.1 are met.
23.2.                                Computer simulation of the requirements of part 11 is allowed where the simulation is sufficiently sophisticated and has been 'Approved' on the basis of an adequate back to back comparison with physical test results.

TABLE 1
GROUP 'AXLE LOAD' LIMITS

Number of 'Axles'  Tyre Type "a" and          Group 'Axle Load'
 in 'Axle Group'   Configuration              Limit (tonnes)