Commission Decision of 28 July 2006 concerning the technical specification of interoperability relating to the subsystem ‘rolling stock — freight wagons’ of the trans-European conventional rail system (notified under document number C(2006) 3345) (Text with EEA relevance) (2006/861/EC) (repealed)

FIN1/Appendix D1 GAUGE OF THE VEHICLE LOWER STEP

1. This norm concerns the step used either for high (550/1 800) or for low platforms (265/1 600). U.K.

To avoid a uselessly wide gap between the step and the platform edge and taking account of the lower vehicle step and of high platforms (550/1 800 mm), the value 1,7 - E can be exceeded in compliance with Appendix C, if a fixed step is concerned. In such a case, the calculations hereafter should be applied which allow checking that, in spite of the protrusion, the step will not reach the platform. The coach should be examined in its lowest position in relation to the running surface.

2. Distance between the track centreline and the platform: U.K.

3. Room required for the step: U.K.

3.1 Step located between bogie pivots: U.K.

3.2 Step located beyond bogie pivots: U.K.

4. Notations (values in metres): U.K.

A_s, A_u =

distance between the track centreline and the outer edge of a step;

B =

distance between the vehicle centreline and the outer edge of the step;

a =

distance between bogie pivots or between end axles;

n =

distance of the step cross section most remote from the bogie pivot;

p =

bogie wheel base;

q =

possible transverse displacement due to the play between the axle and the axle box added with the play between the axle box and the bogie frame measured from the middle position with ultimately worn components;

w_iR =

possible transverse displacement of the bogie pivot and the cradle, measured from the middle position towards the internal side of the curve;

w_aR =

comme w_iR, but towards the outside of the curve;

w_iR/aR =

maximum value in considered curved track (for fixed steps);

= 0,005 m (for controlled steps which for v ≤ 5 km/h unfurl automatically);

l =

maximum track gauge in straight and in considered curved track = 1,544 m;

d =

distance between ultimately worn wheel flanges, measured 10 mm outwards the running circle = 1,492 m;

R =

Curve radius =500 m …. ∞;

t =

allowed tolerance (0,02 m) for the displacement of the rail towards the platform between two maintenance actions.

5. Rules related to the transverse distance between the step and the platform: U.K.

5.1 Distance AV = L - A_s/u should be at least 0,02 m. U.K.

5.2 On a straight track, with a coach in its middle position and a platform in its nominal location, a 150 mm distance between vehicle and platform is considered as sufficiently small. Anyway the smallest value should be sought for this distance. In the opposite case, the check is made on a straight and on a curved track where A_s/u is maximum. U.K.

6. Gauge check U.K.

Gauge check for the lower steps should be carried out on a straight track and on a 500 m curve, if value w is constant or varies linearly according to 1/R. Otherwise, the check should be carried out on a straight track and on curve where A_s/u is maximum.

7. Display of the outputs U.K.

Formulae used, inserted and resulting values should be displayed in an easily understood manner.