Document ID: chunk:federal_register_of_legislation:F2012C00357:reg:1:p6
Version: federal_register_of_legislation:F2012C00357
Segment Type: reg
Provision Reference: reg 1 (pt 6/19)
Character Range: 165005–167778

angle, shall be used to demonstrate compliance with the provisions of this Regulation.

        3.2.4. If the "H" point or the actual torso angle does not satisfy the  requirements of paragraph 3.2.2. above, the "H" point and the actual torso angle shall be determined twice more (three times in all).  If the results of two of these three operations satisfy the requirements, the conditions of paragraph 3.2.3. above shall apply.

        3.2.5. If the results of at least two of the three operations described in paragraph 3.2.4. above do not satisfy the requirements of paragraph 3.2.2. above, or if the verification cannot take place because the vehicle manufacturer has failed to supply information regarding the position of the "R" point or regarding the design torso angle, the centroid of the three measured points or the average of the three measured angles shall be used and be regarded as applicable in all cases where the "R" point or the design torso angle is referred to in this Regulation.

        4. PROCEDURE FOR "H" POINT AND ACTUAL TORSO ANGLE DETERMINATION

        4.1. The vehicle shall be preconditioned at the manufacturer's discretion, at a temperature of 20 + 10 °C to ensure that the seat material reached room temperature.  If the seat to be checked has never been sat upon, a 70 to 80 kg person or device shall sit on the seat twice for one minute to flex the cushion and back.  At the manufacturer's request, all seat assemblies shall remain unloaded for a minimum period of 30 minutes prior to installation of the 3‑D H machine.

        4.2.  The vehicle shall be at the measuring attitude defined in paragraph 2.11. above.

        4.3. The seat, if it is adjustable, shall be adjusted first to the  rearmost normal driving or riding position, as indicated by the  vehicle manufacturer, taking into consideration only the longitudinal adjustment of the seat, excluding seat travel used for purposes other than normal driving or riding positions.  Where other modes of seat adjustment exist (vertical, angular, seat‑back, etc.) these will then be adjusted to the position specified by the vehicle manufacturer.  For suspension seats, the vertical position shall be rigidly fixed corresponding to a normal driving position as specified by the manufacturer.

        4.4. The area of the seating position contacted by the 3‑D H machine shall be covered by a muslin cotton, of sufficient size and appropriate texture, described as a plain cotton fabric having 18.9 threads per cm2 and weighing 0.228 kg/m2 or knitted or non‑woven fabric having equivalent characteristics.  If the test is run  on a seat outside the vehicle, the floor on which the seat is placed shall have the same essential characteristics [2]/ as the floor of the vehicle in