---
kind: "section"
citation: "49 C.F.R. § 393.201"
title: "49"
number: "393.201"
heading: "Frames."
url: "https://uscodex.org/cfr/49/393.201"
---

# §393.201. Frames.

- (a) The frame or chassis of each commercial motor vehicle shall not be cracked, loose, sagging or broken.
- (b) Bolts or brackets securing the cab or the body of the vehicle to the frame must not be loose, broken, or missing.
- (c) The frame rail flanges between the axles shall not be bent, cut or notched, except as specified by the manufacturer.
- (d) Parts and accessories shall not be welded to the frame or chassis of a commercial motor vehicle except in accordance with the vehicle manufacturer's recommendations. Any welded repair of the frame must also be in accordance with the vehicle manufacturer's recommendations.
- (e) No holes shall be drilled in the top or bottom rail flanges, except as specified by the manufacturer.

## Notes

### Amendments

[53 FR 49402, Dec. 7, 1988, as amended at 70 FR 48055, Aug. 15, 2005]

### Source

Source: 53 FR 49402, Dec. 7, 1988, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 31136, 31151, 31502; sec. 1041(b), Pub. L. 102-240, 105 Stat. 1914, 1993; secs. 5301 and 5524, Pub. L. 114-94, 129 Stat. 1312, 1543, 1560; and 49 CFR 1.87.

### Source

Source: 33 FR 19735, Dec. 25, 1968, unless otherwise noted.

### Amendments

[53 FR 49402, Dec. 7, 1988, as amended at 70 FR 48055, Aug. 15, 2005]