Document ID: chunk:federal_register_of_legislation:F2017C00972:body:0:p17
Version: federal_register_of_legislation:F2017C00972
Segment Type: other
Provision Reference: 
Character Range: 44890–47731

of the seat‑back frame through a component simulating the back of the manikin shown in annex 3 to this Regulation.  In the case of a bench seat, where part or all of the supporting frame (including that of the head restraints) is common to more than one seating position, the test shall be conducted simultaneously for all those seating positions.

        6.3. Test of strength of the seat anchorage and the adjustment, locking and displacement systems

        6.3.1. A longitudinal horizontal deceleration of not less than 20 g shall be applied for 30 milliseconds in the forward direction to the whole shell of the vehicle, in accordance with the requirements of annex 7, paragraph 1.  At the request of the manufacturer the test pulse described in annex 9 - appendix, may be used alternatively.

        6.3.2. A longitudinal deceleration in accordance with the requirements of paragraph 6.3.1. shall be applied in the rearward direction.

        6.3.3. The requirements of paragraphs 6.3.1. and 6.3.2. above shall be verified for all positions of the seat.  In the case of seats fitted with an adjustable head restraint, the test shall be conducted with the head restraints placed in the most unfavourable position (generally the highest position) allowed by its adjusting system.  During the test the seat shall be so positioned that no external factor shall prevent the release of the locking systems.

         These conditions shall be considered to be met if the seat is tested after being adjusted in the following positions:

         the longitudinal adjustment is fixed one notch or 10 mm rearward of the most forward normal driving position or position of use as indicated by the manufacturer (for seats with independent vertical adjustment, the cushion shall be placed in its highest position);

         the longitudinal adjustment is fixed one notch or 10 mm forward of the most rearward normal driving position or position of use as indicated by the manufacturer (for seats with independent vertical adjustment, the cushion shall be placed in its lowest position), and, where appropriate, in accordance with the requirements of paragraph 6.3.4. below.

        6.3.4. In cases where the arrangement of the locking systems is such that, in a seat position other than those defined in paragraph 6.3.3. above, the distribution of the forces on the locking devices and seat anchorages would be less favourable than with either configuration defined in paragraph 6.3.3., the tests shall be conducted for that less favourable seating position.

        6.3.5. The test conditions of paragraph 6.3.1. shall be considered to be satisfied if, at the request of the manufacturer, they are replaced by a collision test of the complete vehicle in running order against a rigid barrier as laid down in paragraph 2. of annex 7 to this