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Home Chapters 5.0 5.1 Frames (393.201) 5.1.6 Frames (393.201)
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Note:

5.1.6 Frames (393.201)

The frame or chassis of each commercial motor vehicle must not be cracked, loose, sagging, or broken. Parts and accessories must not be welded to the frame or chassis of a commercial vehicle except per vehicle manufacturer recommendations. Any welded repair of the frame must comply with vehicle manufacturer recommendations.

See 49 CFR 393.201 for full requirements on vehicle frames.
Disclaimer
This publication is distributed by the U.S. Department of Transportation, Federal Motor Carrier Safety Administration (FMCSA). It is meant to serve as a guide only and the Agency does not assume responsibility for any omissions, errors, or ambiguity contained herein. The contents may not be relied upon as a substitute for the Agency’s published regulations.

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