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Reading the regulations as they stood on October 1, 2001. Current text may differ.Switch to current
Historical textIn force on Oct. 1, 2001Source: annual CFR editions 1996–2004

§ 393.201 Frames.

Wording first on file in the 1996 annual edition, superseded by the 2005 annual edition.

govinfo, 2001 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2001 edition's wording. An amendment that took effect between Oct. 1, 2001 and Oct. 1, 2001 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 393.201 — Frames.. Text in force on October 1, 2001. This wording effective October 1, 1996 to October 1, 2005. Source: govinfo, 2001 edition, https://www.govinfo.gov/app/details/CFR-2001-title49-vol4/CFR-2001-title49-vol4-sec393-201. Retrieved from FMCSR.com, https://fmcsr.com/reg/393.201?asof=2001-10-01, on October 26, 2026. Unofficial compilation; verify against the official source.

(a) The frame of every bus, truck, and truck tractor 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) All accessories mounted to the truck tractor frame must be bolted or riveted.

(e) No holes shall be drilled in the top or bottom rail flanges, except as specified by the manufacturer.

(f) Field repairs are allowed.

Amendment history

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

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.