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Reading the regulations as they stood on December 23, 2021. Current text may differ.Switch to current
Current textIn force on Dec. 23, 2021Source: eCFR

§ 393.201 Frames.

Current wording, in the annual edition revised as of Oct. 1, 2005.

eCFR as of December 23, 2021 ↗
49 CFR § 393.201 — Frames.. Text in force on December 23, 2021. This wording effective October 1, 2005 to present. Source: eCFR as of December 23, 2021, https://www.ecfr.gov/on/2021-12-23/title-49/section-393.201. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.201?asof=2021-12-23, on October 26, 2026. Unofficial compilation; verify against the official source.

(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.

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

Amendment history

2 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2005 → presentannual editions 2005–2016diff vs. previousviewing
    [53 FR 49402, Dec. 7, 1988, as amended at 70 FR 48055, Aug. 15, 2005]
  2. Oct. 1, 1996 → Oct. 1, 2005annual editions 1996–2004

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.