# Class 2 (gases) material cylinders.

**Citation:** 49 CFR 174.201  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Except as provided in paragraphs (b) and (c) of this section, cylinders containing Class 2 (gases) materials being transported in a rail car must be:

(1) Securely lashed in an upright position so as to prevent their overturning;

(2) Loaded into racks securely attached to the car;

(3) Packed i

## Document text

(a) Except as provided in paragraphs (b) and (c) of this section, cylinders containing Class 2 (gases) materials being transported in a rail car must be:

(1) Securely lashed in an upright position so as to prevent their overturning;

(2) Loaded into racks securely attached to the car;

(3) Packed in boxes or crates of such dimensions as to prevent their overturning; or

(4) Loaded in a horizontal position.

(b) Specification DOT-4L (§ 178.57 of this subchapter) cylinders being transported in a rail car must be loaded in an upright position and be securely braced.

(c) Cylinders containing Class 2 (gases) materials may be transported in stock cars, gondola cars and flat cars. However, they may not be transported in hopper bottom cars.

[Amdt. 174-26, 41 FR 16092, Apr. 15, 1976, as amended by Amdt. 174-26A, 41 FR 40685, Sept. 20, 1976; Amdt. 174-32, 43 FR 48644, Oct. 19, 1978; Amdt. 174-68, 55 FR 52682, Dec. 21, 1990]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-174.201>
- Source ID: `ecfr`
- SHA-256: `38117328b84bee5dd76f6471b92f494d9b9bc07c2ed6f3c35452eea4201af33e`
- Retrieved: 2026-08-20T05:46:04.619Z
- Exported: 2026-08-23T09:26:49.155Z
- Document slug: `49-cfr-174-201`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "174",
  "section": "174.201",
  "subpart": "Subpart F—Detailed Requirements for Class 2 (Gases) Materials",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```