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Missouri has adopted Part 393 of the Federal Motor Carrier Safety Regulations (FMCSRs).
The adoption includes regulations dealing with projecting loads (393.87) and cargo securement (Part 393, Subpart I).
Part 393 applies to commercial motor vehicles operated in intrastate commerce which have a gross vehicle weight rating or gross combination weight rating of 26,001 pounds or more, or vehicles transporting hazardous materials.
In Missouri, all motor vehicles, and every trailer and semitrailer operating upon public highways and carrying goods or material or farm products which may reasonably be expected to become dislodged and fall as a result of wind or air pressure or by movement must have a protective cover or be sufficiently secured so that no portion of the goods or material can become dislodged and fall upon the highway.