Document ID: chunk:federal_register_of_legislation:F2019C00042:front:0:p34
Version: federal_register_of_legislation:F2019C00042
Segment Type: other
Provision Reference: 
Character Range: 92177–94942

until 350 mm of the strap is withdrawn from retractor, and then released to the initial position.

         7.7. Dynamic test of belt assembly or of the restraint system

         7.7.1. The belt assembly shall be mounted on a trolley equipped with the seat and the anchorage defined in Annex 6 to this Regulation. However, if the belt assembly is intended for a specific vehicle or for specific types of vehicle, the distances between the manikin and the anchorages shall be determined by the service conducting the tests, either in conformity with the instructions for fitting supplied with the belt or in conformity with the data supplied by the manufacturer of the vehicle. If the belt is equipped with a belt adjustment device for height such as defined in paragraph 2.9.6. above, the position of the device and the means of securing it shall be the same as those of the vehicle design.

          In that case, when the dynamic test has been carried out for a type of vehicle it need not be repeated for other types of vehicle where each anchorage point is less than 50 mm distant from the corresponding anchorage point of the tested belt. Alternatively, manufacturers may determine hypothetical anchorage positions for testing in order to enclose the maximum number of real anchorage points.

         7.7.1.1. In the case of a safety‑belt or restraint system forming part of an assembly for which type approval is requested as a restraint system, the safety‑belt shall be mounted either as defined in paragraph 7.7.1. or on the part of the vehicle structure to which the restraint system is normally fitted and this part shall be rigidly attached to the test trolley in the way prescribed in paragraphs 7.7.1.2. to 7.7.1.6.

          In the case of a safety‑belt or restraint system with pre‑loading devices relying on component parts other than those incorporated in the belt assembly itself, the belt assembly shall be mounted in conjunction with the necessary additional vehicle parts on the test trolley in the manner prescribed in paragraphs 7.7.1.2. to 7.7.1.6.

          Alternatively, in the case where those devices cannot be tested on the test trolley, the manufacturer may demonstrate by a conventional frontal impact test at 50 km/h in conformity with the procedure ISO 3560 (1975) that the device complies with the requirements of the Regulation.

         7.7.1.2. The method used to secure the vehicle during the test shall not be such as to strengthen the anchorages of the seats or safety‑belts or to lessen the normal deformation of the structure. No forward part of the vehicle shall be present which by limiting the forward movement of the manikin excepting the foot, would reduce the load imposed on the restraint system during