---
kind: "section"
citation: "49 C.F.R. § 572.186"
title: "49"
number: "572.186"
heading: "Abdomen assembly."
url: "https://uscodex.org/cfr/49/572.186"
---

# §572.186. Abdomen assembly.

- (a) The abdomen assembly (175-5000) is part of the dummy assembly shown in drawing 175-0000 including load sensors specified in [§ 572.189(e)](/cfr/49/572.189.md?p=e). When subjected to tests procedures specified in [paragraph (b)](#b) of this section, the abdomen assembly shall meet performance requirements specified in [paragraph (c)](#c) of this section.
- (b) **Test procedure.**
  - (1) Soak the dummy assembly (175-0000), without suit (175-8000) and shoulder foam pad (175-3010), as specified in [§ 572.189(n)](/cfr/49/572.189.md?p=n);
  - (2) The dummy is seated as shown in Figure U5 in appendix A to this subpart;
  - (3) The abdomen impactor is the same as specified in [§ 572.189(a)](/cfr/49/572.189.md?p=a) except that on its rectangular impact surface is affixed a special purpose block whose weight is 1.0 ±0.01 kg. The block is 70 mm high, 150 mm wide and 60 to 80 mm deep. The impact surface is flat, has a minimum Rockwell hardness of M85, and an edge radius of 4 to 5 mm. The block's wide surface is horizontally oriented and centered on the longitudinal axis of the probe's impact face as shown in Figure U5-A in appendix A to this subpart;
  - (4) The impactor is guided, if needed, so that at contact with the abdomen its longitudinal axis is within ±0.5 degrees of a horizontal plane and perpendicular ±0.5 degrees to the midsagittal plane of the dummy and the centerpoint on the impactor's face is aligned within 5 mm of the center point of the middle load measuring sensor in the abdomen as shown in Figure U5;
  - (5) The impactor impacts the dummy's abdomen at 4.0 m/s ±0.1 m/s;
  - (6) Time zero is defined in [§ 572.189(k)](/cfr/49/572.189.md?p=k).
- (c) **Performance criteria.**
  - (1) The maximum sum of the forces of the three abdominal load sensors, specified in 572.189(e), shall be not less than 2200 N and not more than 2700 N and shall occur between 10 ms and 12.3 ms from time zero. The calculated sum of the three load cell forces must be concurrent in time.
  - (2) Maximum impactor force (impact probe acceleration multiplied by its mass) is not less than 4000 N and not more than 4800 N occurring between 10.6 ms and 13.0 ms from time zero.

## Notes

### Source

Source: 71 FR 75331, Dec. 14, 2006, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 322, 30111, 30115, 30117 and 30166; delegation of authority at 49 CFR 1.95