# -5 Tank head puncture resistance system.

**Citation:** 49 CFR 179.202-5  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

The DOT-117 specification tank car must have a tank head puncture resistance system in conformance with § 179.16(c). The full height head shields must have a minimum thickness of 1/2 inch.

[80 FR 26749, May 8, 2015]

## Document text

The DOT-117 specification tank car must have a tank head puncture resistance system in conformance with § 179.16(c). The full height head shields must have a minimum thickness of 1/2 inch.

[80 FR 26749, May 8, 2015]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-179.202-5>
- Source ID: `ecfr`
- SHA-256: `dc9759eaa47fd74c49960d11d9c33e22e2e2c6e2960fa8b09b332226fa7f5b2d`
- Retrieved: 2026-08-20T05:46:20.606Z
- Exported: 2026-08-24T21:12:15.765Z
- Document slug: `49-cfr-179-202-5`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "179",
  "section": "179.202-5",
  "subpart": "Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```