scope:

This standard defines different multiple vehicles (vehicle combinations with more than one coupling point) and the formulas to calculate the requirement of performance for the coupling equipment used in those vehicle combinations. Vehicle categories concerned are N2,N3, O3 and O4. For these vehicle combinations the formulas in this standard override the formulas in the standards [6], [7], [8] and [9] listed in clause 7, which are applying to vehicle combinations with one coupling point only. However the capability of the coupling equipment shall still be determined through tests as defined in the standards [6], [7], [8] and [9] listed in clause 7.