Document ID: chunk:federal_register_of_legislation:F2006L01454:body:0:p19
Version: federal_register_of_legislation:F2006L01454
Segment Type: other
Provision Reference: 
Character Range: 55595–58960

the 'Seat' under test; or

2.6.2.2.                        a concentrated load at the loading centroid of the same size may be used in place of the distributed loads.

APPENDIX 2
SEAT BACK ENERGY-DISSIPATING TEST

          1. DETERMINATION OF HEAD IMPACT ZONE

              1.                                  Headform Procedure - General

                  1.                            Any surface which is contactable by the headform using the procedure as follows is part of the head impact zone.

                  2.                            The headform to be used must be a spherical headform 165 mm in diameter pivoted about the 'H‑Point' such that the distance from the 'H‑Point' to the top of the headform is continuously adjustable between 736 mm and 840 mm.

                  3.                            The headform must be moved through all arcs of the vertical plane down to a position of 25.4 mm above the 'H-Point' and as far as 20 degrees on either side of the longitudinal vertical plane which passes through the 'H‑Point'.

                  4.                            Each excursion must start from vertical and the length of the arm must not be changed during any given excursion.

              2.                                  Points of Contact

                  1.                            All points of contact must be established as specified in the following clauses.

                  2.                            Areas where the energy dissipating properties are uniform over a range of points of contact can be treated as one point of contact located at the position which would give the worst result in the test specified in clause 5.1 of this Appendix.

                  3.                            Areas where the energy-dissipating property varies by virtue of varying padding thickness alone can be treated as one point of contact located at the position of minimum thickness of padding or which would give the worst result in the test specified in clause 5.1 of this Appendix, whichever is the more stringent.

                  4.                            For determining the head-impact zone the 'Seats' must, if they are adjustable, be in the rearmost position with their backs inclined as near as possible to 25o unless indicated otherwise by the manufacturer.

          1. REAR PARTS OF SEATS

              1.                                  Requirements

                  1.                            The surface of rear parts of 'Seats' must not exhibit dangerous roughness or sharp edges likely to increase the risk or severity of injury to the occupants.

                  2.                            That part of the back of the 'Seat' which is in the head-impact zone defined in clause 1 of this Appendix must be energy-dissipating, as prescribed in clause 5 of this Appendix.

                      1.                      In the case of 'Seats' fitted with 'Head Restraints', each test must be carried out with the 'Head Restraint' in the lowest position.

                      2.                      In the case of a 'Seat' which is designed to be fitted in several types of vehicle, the impact zone must be determined with the 'Seats' installed at 750 mm pitch.

                      3.                      Where this is done, the resultant impact zone