Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p11
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 30567–33497

Figure 3), specified as follows:

       5.3.1. The complete vehicle is standing on the tilting platform, with blocked suspension and is tilted slowly to its unstable equilibrium position.  If the vehicle type is not fitted with occupant restraints it will be tested at unladen kerb mass.  If the vehicle type is fitted with occupant restraints it will be tested at total effective vehicle mass;

       5.3.2. The rollover test starts in this unstable vehicle position with zero angular velocity and the axis of rotation runs through the wheel-ground contact points.  At this moment the vehicle is characterized by the reference energy ER (see paragraph 3.2.2.1. and Figure 3);

       5.3.3. The vehicle tips over into a ditch, having a horizontal, dry and smooth concrete ground surface with a nominal depth of 800 mm;

       5.3.4. The detailed technical specification of the rollover test on a complete vehicle as the basic approval test is given in Annex 5.

                   Figure 3 - Specification of the rollover test on a complete vehicle showing the path of
           the centre of gravity through the starting, unstable equilibrium, position

       5.4. Specifications of equivalent approval tests

        Instead of the rollover test on a complete vehicle, at the discretion of the manufacturer, one of the following equivalent approval test methods can be chosen:

       5.4.1. Rollover test on body sections which are representative of the complete vehicle, in accordance with the specifications of Annex 6.

5.4.2. Quasi-static loading tests of body sections in accordance with the specifications of Annex 7.

       5.4.3. Quasi-static calculations based on the results of component tests in accordance with the specifications of annex 8.

5.4.4. Computer simulation - via dynamic calculations - of the basic rollover test on a complete vehicle in accordance with the specifications of Annex 9.
5.4.5. The basic principle is that the equivalent approval test method must be carried out in such a way that it represents the basic rollover test specified in Annex 5.  If the equivalent approval test method chosen by the manufacturer cannot take account of some special feature or construction of the vehicle (e.g. air-conditioning installation on the roof, changing height of the waist rail, changing roof height) the complete vehicle may be required by the technical service to undergo the rollover test specified in Annex 5.
       5.5. Testing of articulated vehicles

        In the case of an articulated vehicle, each rigid section of the vehicle shall comply with the general requirement specified in paragraph 5.1.  Each rigid section of an articulated vehicle may be tested separately or in combination as described in Annex 5, paragraph 2.3, or in Annex 3, paragraph 2.6.7.

       5.6. Direction of rollover test

        The rollover test shall be carried out on that side of the vehicle which