---
kind: "section"
citation: "49 C.F.R. § 238.713"
title: "49"
number: "238.713"
heading: "End structure integrity of non-cab end."
url: "https://uscodex.org/cfr/49/238.713"
---

# §238.713. End structure integrity of non-cab end.

- (a) **General.** Tier III trainsets shall comply with the requirements in paragraphs [(b)](#b) and [(c)](#c) of this section to demonstrate the integrity of the end structure for other than the cab ends.
- (b) **Collision post requirements.**
  - (1) Each unit of a Tier III trainset shall have at each non-cab end of the unit either:
    - (i) **Two full-height collision posts, located at approximately the one-third points laterally.** Each collision post shall have an ultimate longitudinal shear strength of not less than 300,000 pounds at a point even with the top of the underframe member to which it is attached. If reinforcement is used to provide the shear value, the reinforcement shall have full value for a distance of 18 inches up from the underframe connection and then taper to a point approximately 30 inches above the underframe connection; or
    - (ii) An equivalent end structure that can withstand the sum of forces that each collision post in [paragraph (b)(1)(i)](#b-1-i) of this section is required to withstand. For analysis purposes, the required forces may be assumed to be evenly distributed at the locations where the equivalent structure attaches to the underframe.
  - (2) Collision posts are not required for the non-cab ends of any unit with push-back couplers and interlocking anti-climbing mechanisms in a Tier III trainset, or the non-cab ends of a semi-permanently coupled consist of trainset units, if the inter-car connection is capable of preventing disengagement and telescoping to the same extent as equipment satisfying the anti-climbing and collision post requirements in [subpart C](/cfr/49/subpartC.md) of this part. For demonstrating that the inter-car connection is capable of preventing such disengagement (and telescoping), the criteria in [§ 238.707(b)](/cfr/49/238.707.md?p=b) apply.
- (c) **Corner post requirements.**
  - (1) Each passenger car in a Tier III trainset shall have at each non-cab end of the car, placed ahead of the occupied volume, two side structures capable of resisting a:
    - (i) 150,000-pound horizontal force applied at floor height without failure;
    - (ii) 20,000-pound horizontal force applied at roof height without failure; and
    - (iii) 30,000-pound horizontal force applied at a point 18 inches above the top of the floor without permanent deformation.
  - (2) For purposes of this [paragraph (c)](#c), the orientation of the applied horizontal forces shall range from longitudinal inward to transverse inward.
  - (3) For each evaluation load, the load shall be applied to an area of the structure sufficient to not locally cripple or punch through the material.
  - (4) The load area shall be chosen to be appropriate for the particular car design and shall not exceed 10 inches by 10 inches.

## Notes

### Source

Source: 83 FR 59219, Nov. 21, 2018, unless otherwise noted.

### 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.