[Code of Federal Regulations]
[Title 49, Volume 6]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR572.19]

[Page 911-912]
 
                        TITLE 49--TRANSPORTATION
 
                   CHAPTER V--NATIONAL HIGHWAY TRAFFIC
                    SAFETY ADMINISTRATION, DEPARTMENT
                            OF TRANSPORTATION
 
PART 572_ANTHROPOMORPHIC TEST DEVICES--Table of Contents
 
                       Subpart C_3-Year-Old Child
 
Sec.  572.19  Lumbar spine, abdomen and pelvis.

    (a) The lumbar spine, abdomen, and pelvis consist of the part of the 
torso assembly shown by number SA 103C 030 on drawing SA 103C 001 and 
conform to each of the applicable drawings listed under this number on 
drawing SA 103C 002, sheets 10 and 11.
    (b) When subjected to continuously applied force in accordance with 
paragraph (c) of this section, the lumbar spine assembly shall flex by 
an amount that permits the rigid thoracic spine to rotate from its 
initial position in accordance with Figure 18 of this subpart by 40 
degrees at a force level of not less than 34 pounds and not more than 47 
pounds, and straighten upon removal of the force to within 5 degrees of 
its initial position.
    (c) Test procedure. (1) The dummy with lower legs removed is 
positioned in an upright seated position on a seat as indicated in 
Figure 18, ensuring that all dummy component surfaces are clean, dry and 
untreated unless otherwise specified.
    (2) Attach the pelvis to the seating surface by a bolt C/328, 
modified as shown in Figure 18, and the upper legs at the knee axial 
rotation joints by the attachments shown in Figure 18. Tighten the 
mountings so that the pelvis-lumbar joining surface is horizontal and 
adjust the femur ball-flange screws at each hip socket joint to 50 inch 
pounds torque. Remove the head and

[[Page 912]]

the neck and install a cylindrical aluminum adapter 2.0 inches in 
diameter and 2.80 inches long in place of the neck.
    (3) Flex the thorax forward 50 degrees and then rearward as 
necessary to return to its initial position in accordance with Figure 18 
unsupported by external means.
    (4) Apply a forward pull force in the midsagittal plane at the top 
of the neck adapter, so that at 40 degrees of the lumbar spine flexion 
the applied force is perpendicular to the thoracic spine box. Apply the 
force at any torso deflection rate between 0.5 and 1.5 degrees per 
second up to 40 degrees of flexion but no further; continue to apply for 
10 seconds the force necessary to maintain 40 degrees of flexion, and 
record the highest applied force at that time. Release all force as 
rapidly as possible and measure the return angle 3 minutes after the 
release.