Document ID: chunk:federal_register_of_legislation:F2019L00029:body:0:p17
Version: federal_register_of_legislation:F2019L00029
Segment Type: other
Provision Reference: 
Character Range: 43577–46122

effective seat-back angle as close as possible to 25° for vehicles of categories M1 and N1 and to 15° for vehicles of all other categories.
6.2. Securing the vehicle for seat belt anchorages tests.
6.2.1. The method used to secure the vehicle during the test shall not be such as to strengthen the seat belt anchorages and their anchorage area or to lessen the normal deformation of the structure.
6.2.2. A securing device shall be regarded as satisfactory if it produces no effect on an area extending over the whole width of the structure and if the vehicle or the structure is blocked or fixed in front at a distance of not less than 500 mm from the anchorage to be tested and is held or fixed at the rear not less than 300 mm from that anchorage.
6.2.3. It is recommended that the structure should rest on supports arranged approximately in line with the axes of the wheels or, if that is not possible, in line with the points of attachment of the suspension.
6.2.4. If a securing method other than that prescribed in paragraphs 6.2.1. to 6.2.3. of this Regulation is used, evidence must be furnished that it is equivalent.
6.3. General test requirements for seat belt anchorages
6.3.1. All the belt anchorages of the same group of seats shall be tested simultaneously. However, if there is a risk that non-symmetrical loading of the seats and/or anchorages may lead to failures, an additional test may be carried out with non-symmetrical loading.
6.3.2. The tractive force shall be applied at an angle of 10 degrees ±5° above the horizontal, in a plane parallel to the median longitudinal plane of the vehicle.
 A preload of 10 per cent with a tolerance of ±30 per cent of the target load shall be applied; the load shall be increased to 100 per cent of the relevant target load.
6.3.3. Full application of the load shall be achieved as rapidly as possible, and within a maximum load application time of 60 seconds.
 However, the manufacturer may request the application of the load to be achieved within 4 seconds.
 The belt anchorages must withstand the specified load for not less than 0.2 second.
6.3.4. Traction devices to be used in the tests described in paragraph 6.4. below are shown in Annex 5. The devices shown in Annex 5, Figure 1 are placed onto the seat cushion and then, when possible, pushed back into the seat back while the belt strap is pulled tight around it. The device shown in Annex 5, Figure 2 is placed in position, the belt strap is fitted over the device and pulled tight. No preload beyond the minimum necessary