Document ID: chunk:federal_register_of_legislation:F2016C00867:body:0:p16
Version: federal_register_of_legislation:F2016C00867
Segment Type: other
Provision Reference: 
Character Range: 46193–49471

position in the test machine.
2.2.2.2.2.              Apply the test load, in the direction specified in paragraph 6.1.2. of this Regulation and Figure 3-4, at a rate not to exceed 5 mm/min until the required load has been achieved. Record the maximum load achieved.
2.3.                                    Load test three (For doors that open in a vertical direction)
2.3.1.                              Equipment: Tensile testing fixture (see Figure 3-3).
2.3.2.                              Procedure
2.3.2.1.                        Attach the test fixture to the mounting provisions of the latch and striker. Mount the test fixture with the latch and striker in the fully latched position in the test machine.
2.3.2.2.                        Apply the test load, in the direction specified in paragraph 6.1.3. of this Regulation and Figure 3-4, at a rate not to exceed 5 mm/min until the required load has been achieved. Record the maximum load achieved.
Figure 3-1
Door latch - Tensile testing fixture for load test one

Figure 3-2
Door latch – Tensile testing fixture for load test two

Figure 3-3
Door latch – Tensile testing fixture for load test three (For doors that open in a vertical direction)

Figure 3-4
Door static load test directions

Annex 4

Inertial test procedures
          1. Purpose
 To determine the ability of the vehicle latch system to resist inertial loading by means of a mathematical analysis of the component parts in their true car relationship or by evaluation using a dynamic test.
2.                                          Test procedures
2.1.                                    Option 1, Calculation.
2.1.1.                              The procedure described in this annex provides a means for analytically determining the ability of a door latch system to withstand inertial loading. Spring forces are the average of the minimum spring output in the installed position and the minimum spring output in the release position. Friction effects and work to be done are not considered in the calculations. Gravitational pull on components may also be omitted if it tends to restrict unlatching. These omissions from the calculations are permissible because they provide additional factors of safety.
2.1.2.                              Calculation Consideration - Each component or subassembly can be calculated for its minimum inertial load resistance in a particular direction. Their combined resistance to the unlatching operation must assure that the door latch system (when properly assembled in the vehicle door) will remain latched when subjected to an inertial load of 30 g in any direction. Figure 4-1 is an example of the components and combinations of components to be considered.
2.2.                                    Option 2, Full vehicle dynamic test
2.2.1.                              Test equipment
2.2.1.1.                        An acceleration (or deceleration) device.
2.2.1.2.                                      One of the following vehicles:
2.2.1.2.1.              A full vehicle including at least door(s), door latch(es), exterior door handle(s) with mechanical latch operation, interior door opening lever(s), the locking device(s), interior trim and door seal.
2.2.1.2.2.              A vehicle body