[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR572.9]

[Page 760-761]
 
                        TITLE 49--TRANSPORTATION
 
                            OF TRANSPORTATION
 
PART 572--ANTHROPOMORPHIC TEST DEVICES--Table of Contents
 
                     Subpart B--50th Percentile Male
 
Sec. 572.9  Lumbar spine, abdomen, and pelvis.

    (a) The lumbar spine, abdomen, and pelvis consist of the assemblies 
designated as numbers SA 150 M050 and SA

[[Page 761]]

150 M060 in Figure 1 and conform to the drawings subtended by these 
numbers.
    (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 11 by the number of degrees 
shown below at each specified force level, and straighten upon removal 
of the force to within 12 degrees of its initial position in accordance 
with Figure 11.

------------------------------------------------------------------------
                                                           Force (6
                                                              pounds)
------------------------------------------------------------------------
0.......................................................             0
20......................................................            28
30......................................................            40
40......................................................            52
------------------------------------------------------------------------

    (c) Test procedure: (1) Assemble the thorax, lumbar spine, pelvic, 
and upper leg assemblies (above the femur force transducers), ensuring 
that all component surfaces are clean, dry, and untreated unless 
otherwise specified, and attach them to the horizontal fixture shown in 
Figure 5 at the two link rod pins and with the mounting brackets for the 
lumbar test fixtures illustrated in Figures 6 to 9.
    (2) Attach the rear mounting of the pelvis to the pelvic instrument 
cavity rear face at the four \1/4\'' cap screw holes and attach the 
front mounting at the femur axial rotation joint. Tighten the mountings 
so that the pelvic-lumbar adapter is horizontal and adjust the femur 
friction plungers at each hip socket joint to 240 inch-pounds torque.
    (3) Flex the thorax forward 50 deg. and then rearward as necessary 
to return it to its initial position in accordance with Figure 11 
unsupported by external means.
    (4) Apply a forward force perpendicular to the thorax instrument 
cavity rear face in the midsagittal plane 15 inches above the top 
surface of the pelvic-lumbar adapter. Apply the force at any torso 
deflection rate between .5 and 1.5 degrees per second up to 40 deg. of 
flexion but no further, continue to apply for 10 seconds that force 
necessary to maintain 40 deg. of flexion, and record the force with an 
instrument mounted to the thorax as shown in Figure 5. Release all force 
as rapidly as possible and measure the return angle 3 minutes after the 
release.
    (d) When the abdomen is subjected to continuously applied force in 
accordance with paragraph (e) of this section, the abdominal force-
deflection curve shall be within the two curves plotted in Figure 10.
    (e) Test procedure: (1) Place the assembled thorax, lumbar spine and 
pelvic assemblies in a supine position on a flat, rigid, smooth, dry, 
clean horizontal surface, ensuring that all component surfaces are 
clean, dry, and untreated unless otherwise specified.
    (2) Place a rigid cylinder 6 inches in diameter and 18 inches long 
transversely across the abdomen, so that the cylinder is symmetrical 
about the midsagittal plane, with its longitudinal centerline horizontal 
and perpendicular to the midsagittal plane at a point 9.2 inches above 
the bottom line of the buttocks, measured with the dummy positioned in 
accordance with Figure 11.
    (3) Establish the zero deflection point as the point at which a 
force of 10 pounds has been reached.
    (4) Apply a vertical downward force through the cylinder at any rate 
between 0.25 and 0.35 inches per second.
    (5) Guide the cylinder so that it moves without significant lateral 
or rotational movement.

[42 FR 7152, Feb. 7, 1977]