Front End Structure Rules

Quick Answer

49 CFR 393.106 covers front end structures — headache racks, bulkheads, and similar equipment meant to protect the cab from forward-shifting cargo. A front end structure may reduce the need for tiedowns restraining forward movement, but it must meet specific strength requirements and be in serviceable condition.

What 49 CFR 393.106 requires

The regulation establishes performance requirements for front end structures used on commercial motor vehicles. A compliant front end structure must be capable of withstanding the forward force from cargo without failing — the specific requirements are set out in the regulation and depend on the cargo weight being restrained.

Not every headache rack or cab guard qualifies as a compliant front end structure under 393.106. A decorative rack, lightweight cab protector, or rack not designed for cargo restraint loads may not meet the performance standards even if it physically sits between the cargo and the cab.

Verify the current eCFR text for 393.106 and the equipment manufacturer's documentation before relying on any structure as a front-end restraint.

When a front end structure affects the securement plan

A qualifying front end structure may reduce the number of forward-restraint tiedowns required for certain loads. However, this reduction has conditions — the structure must meet the requirements, must be appropriate for the load being carried, and must be in good condition.

This site does not claim to determine whether any specific front end structure qualifies under the regulation. That determination requires reviewing the equipment manufacturer's specifications against the current regulatory requirements.

For most flatbed operations, the front end structure is one layer of protection, not a complete forward-restraint solution. Tiedowns are still required for most loads regardless of front end structure presence.

Inspection and condition

Front end structures are subject to significant forces in hard braking events. Inspect the structure before every trip: check for bent uprights, cracked welds, loose mounting hardware, and signs that a previous overload has deformed the structure.

A damaged front end structure that has been in a previous overload incident may look intact but have reduced structural capacity. If there is any doubt about condition, handle the forward restraint requirement with tiedowns rather than relying on the structure.

Check mounting integrity — a structure that is not securely attached to the trailer or truck frame cannot transmit forces effectively regardless of its own strength.

Practical Notes

This topic carries elevated securement risk. Verify the current eCFR rule text, carrier policy, shipper requirements, manufacturer ratings, and the physical condition of every device before a truck moves.