Document ID: chunk:federal_register_of_legislation:F2021C00450:body:0:p3
Version: federal_register_of_legislation:F2021C00450
Segment Type: other
Provision Reference: 
Character Range: 8348–11539

axis of the vehicle.
5.5.2.                              A load equal to 20 times the weight of the entire 'Seat' must be applied in a 'Rearward' longitudinal direction.
5.5.3.                              A load producing a moment of 530 N.m  about the 'Seating Reference Point' for each occupant position for which the 'Seat' is designed must be applied to the upper cross member in a 'Rearward' longitudinal direction, unless it is demonstrated that 'Seat' assemblies such as rear 'Seat' backs are supported by a vehicle body member capable of withstanding the nominated load.
5.5.3.1.                        Testing which meets the 530 N.m requirement by any one of the following 3 methods is acceptable:
5.5.3.1.1.                  force applied horizontally;
5.5.3.1.2.                  force applied normal to 'Seat' back;
5.5.3.1.3.                  force applied longitudinally and 'Rearward' to the upper part of the 'Seat' back frame through a component simulating the back of a 3-D manikin.
5.5.3.1.4.                  If deflection of the 'Seat' back causes the moment arm to change, the force should be adjusted to ensure that the moment value of 530 N.m is achieved.
5.5.3.1.5.                  The 'Seat' must be located in the design position determined by the 'Manufacturer' to represent the worst case in relation to the loadings induced in the seat-anchorage and 'Seat Adjuster' mechanisms by the 530 N.m moment.
5.6.                                    The 'Seat Adjusters' need not be operable after the application of the loads specified in clauses 5.5.1, 5.5.2 and 5.5.3.
5.7.                                    No release of the 'Seat Adjuster' must occur during the application of the loads specified in clauses 5.5.1, 5.5.2 and 5.5.3.
5.8.                                    Restraining Device for Hinged 'Seats' or 'Seat' Backs
5.8.1.                              Except for a 'Seat' having a back that is adjustable only for the comfort of its occupants, hinged 'Seats' or 'Seat' backs must be equipped with a self-locking device for restraining the hinged 'Seat' or 'Seat' back and a release control for releasing that restraining device to preclude the possibility of impact forces acting on unrestrained hinged 'Seats' or 'Seat'  backs.
5.8.2.                              Where the 'Seat' must hinge to permit access to or egress from another seating position, the release control must be readily accessible to the occupant of that 'Seat' and to the occupant of any 'Seat' immediately behind that 'Seat'.
5.8.3.                              The restraining device (including the release control) must be constructed to preclude inertial release when loaded longitudinally in each horizontal direction to 20 times the acceleration due to gravity.
5.8.4.                              The restraining device must not release or fail when a 'Forward' horizontal longitudinal load equal to 20 times the weight of the entire 'Seat' back is applied at the centre of mass of the 'Seat' back.
5.8.5.                              If non-self-locking auxiliary latches are provided they must be unlatched during testing so that only the restraining device and hinges are