Document ID: chunk:federal_register_of_legislation:F2019C00053:front:0:p15
Version: federal_register_of_legislation:F2019C00053
Segment Type: other
Provision Reference: 
Character Range: 44514–47190

used if the ISOFIX position is located on a vehicle seat.

5.2.4.1.                   Subject to paragraphs 5.2.4.3. and 5.2.4.4., the portion of each ISOFIX top tether anchorage that is designed to bind with an ISOFIX top tether connector shall be located not further than 2000 mm far from the shoulder reference point and within the shaded zone, as shown in Figures 6 to 10 of Annex 9, of the designated seating position for which it is installed, with the reference of a template described in
SAE J 826 (July 1995) and shown in Annex 9, Figure 5, according to the following conditions:

5.2.4.1.1.            The "H" point of the template is located at the unique design "H" point of the full downward and full rearward position of the seat, except that the template is located laterally midway between the two ISOFIX lower anchorages;

5.2.4.1.2.            The torso line of the template is at the same angle to the transverse vertical plane as the seat back in its most upright position, and

5.2.4.1.3.            The template is positioned in the vertical longitudinal plane that contains the H-point of the template.

5.2.4.2.                   The ISOFIX top tether anchorage zone may be alternatively located with the aid of the Fixture "ISO/F2" (B), as defined in Regulation No. 16 (Annex 17, Appendix 2, Figure 2), in an ISOFIX position equipped with ISOFIX low anchorages as shown in Figure 11 of Annex 9.

The seating position shall be the seat's rearmost, downmost position with the seat back in its nominal position, or as recommended by the vehicle manufacturer.

In the side view, the ISOFIX top tether anchorage shall lie behind the "ISO/F2" (B) fixture rear face.

The intersection between the "ISO/F2" (B) fixture rear face and the horizontal line (Annex 9, Figure 11, reference 3) containing the last rigid point of a hardness greater than 50 Shore A at the top of the seat back defines the reference point 4 (Annex 9, Figure 11) on the centreline of the "ISO/F2" (B) fixture. At this reference point, a maximum angle of 45° above the horizontal line defines the upper limit      of the top tether anchorage zone.

         In the top view, at the reference point 4 (Annex 9, Figure 11), a maximum angle of 90° extending rearward and laterally and in the rear view, a maximum angle of 40° defines 2 volumes which limit the anchorage zone for the ISOFIX top tether.

The origin of the ISOFIX top tether strap (5) is located at the intersection of the "ISO/F2" (B) fixture with a plane 550 mm distant above the "ISO/F2" (B) fixture horizontal face (1) on the "ISO/F2" (B) fixture centreline (6).
Further, the ISOFIX top tether anchorage shall be more than