Document ID: chunk:federal_register_of_legislation:F2017C00972:body:0:p34
Version: federal_register_of_legislation:F2017C00972
Segment Type: other
Provision Reference: 
Character Range: 89903–92681

area 1 as defined in  paragraph 6.8.1.1. of this Regulation, and possibly in area 2 as defined in paragraph 6.8.1.2. of this Regulation, on surfaces exhibiting radii of curvature less than 5 mm.

        1.4.2.1. For the rear face, the direction of impact from the rear towards the front shall be in a longitudinal plane at an angle of 45° from the vertical.

        1.4.2.2. For the front face, the direction of impact from the front towards the rear shall be horizontal in a longitudinal plane.

        1.4.2.3. The front and rear zones are respectively bounded by the horizontal plane tangential to the top of the head restraint as determined in paragraph 6.5. of this Regulation.

        1.4.3. The headform shall strike the test item at a speed of 24.1 km/h:  this speed shall be achieved either by the mere energy of propulsion or by using an additional impelling device.

        2. Results

         The deceleration rate shall be taken as the average of the readings on the two decelerometers.

        3. Equivalent procedures (see paragraph 6.9. of this Regulation).

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Annex 7

METHOD FOR TESTING THE STRENGTH OF SEAT ANCHORAGES
AND THEIR ADJUSTMENT, LOCKING AND DISPLACEMENT SYSTEMS

        1. Test of resistance to inertia effects

        1.1. The seats to be tested shall be mounted on the vehicle body for which they are designed.  This vehicle body shall be firmly anchored on a test trolley as prescribed in the following paragraphs.

        1.2. The method used for anchoring the vehicle body on the test trolley shall not result in a reinforcement of the seat anchorages.

        1.3. The seats and their parts shall be adjusted and locked as prescribed in paragraph 6.1.1. and in one of the positions described in paragraph 6.3.3. or 6.3.4. of this Regulation.

        1.4. If the seats of a group do not present essential differences in the sense of paragraph 2.2. of this Regulation, the tests prescribed in paragraphs 6.3.1. and 6.3.2. of this Regulation may be carried out with one seat adjusted to its foremost position and the other seat adjusted to its rearmost position.

        1.5. The trolley deceleration is measured with data channels of frequency class (CFC) 60 corresponding to the characteristics of International Standard ISO 6487 (1980).

        2. Collision test of the complete vehicle against a rigid barrier

        2.1. The barrier shall consist of a block of reinforced concrete of not less than 3 m width, not less than 1.5 m height and not less than 0.6 m thickness.  The front face shall be perpendicular to the final part of the run‑up track and shall be covered with plywood boards 19  1 mm thick.  At least 90 tonnes of earth shall be compressed behind the block of reinforced concrete.  The barrier of