---
kind: "section"
citation: "49 C.F.R. § 238.411"
title: "49"
number: "238.411"
heading: "Rear end structures of power car cabs."
url: "https://uscodex.org/cfr/49/238.411"
---

# §238.411. Rear end structures of power car cabs.


The rear end structure of the cab of a power car shall be designed to include the following elements, or their structural equivalent. (A conceptual implementation of this end structure is provided in Figure 2 to this subpart.)

- (a) **Corner posts.** The rear end structure shall have two full-height corner posts, or their structural equivalent, each capable of withstanding the following:
  - (1) A horizontal, longitudinal or lateral shear load of 300,000 pounds at its joint with the underframe without exceeding the ultimate strength of the joint; and
  - (2) A horizontal, longitudinal or lateral shear load of 80,000 pounds at its joint with the roof without exceeding the ultimate strength of the joint.
- (b) **Collision posts.** The rear end structure shall have two full-height collision posts, or their structural equivalent, each capable of withstanding the following:
  - (1) A horizontal, longitudinal shear load of 500,000 pounds at its joint with the underframe without exceeding the ultimate strength of the joint; and
  - (2) A horizontal, longitudinal shear load of 75,000 pounds at its joint with the roof without exceeding the ultimate strength of the joint.

## Notes

### Amendments

[64 FR 25660, May 12, 1999, as amended at 67 FR 19991, Apr. 23, 2002]

### Authority

Authority: 49 U.S.C. 20103, 20107, 20133, 20141, 20302-20303, 20306, 20701-20702, 21301-21302, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 64 FR 25660, May 12, 1999, unless otherwise noted.

### Amendments

[64 FR 25660, May 12, 1999, as amended at 67 FR 19991, Apr. 23, 2002]