A Shipper Overloaded My Trailer and Damaged It. Who Pays in California?

In United States v. Savage Truck Line, Inc., the Fourth Circuit distinguished apparent loading defects, which a carrier could discover through ordinary observation, from concealed defects when the shipper undertook loading. Its discussion allocates responsibility differently for those situations.² This is Fourth Circuit authority whose application requires analysis—not a categorical California rule.

In State of California ex rel. Department of Transportation v. Herc Rentals, Inc., the California Court of Appeal reversed summary judgment for a shipper in a bridge-damage case. The carrier's duties did not categorically eliminate the shipper's potential duty to an injured third party.³ The ruling did not establish final liability or resolve every carrier-versus-shipper equipment claim.

Our related Herc Rentals overheight-cargo Insight explains that distinction. Who loaded, directed, inspected, or accepted the shipment remains important.

For covered operations, 49 C.F.R. section 392.9(a) addresses proper cargo distribution and securement; subsection (b) imposes driver inspection duties, subject to exceptions.⁴ Compliance and the driver's opportunity to identify a problem may matter to responsibility.

Subsection (b)(4) excepts a sealed vehicle when the driver has been ordered not to open it for inspection, or loading that makes cargo inspection impracticable. The exception concerns subsection (b), not a blanket exemption from subsection (a).⁴ A seal alone does not establish shipper liability or answer whether the loading caused the damage.

Address immediate safety concerns first. Preserve evidence as safely practicable before unloading or repairs change the condition. Useful records include:

Total weight, axle loading, equipment capacity, and concentrated floor loading are distinct issues to investigate. A permissible total shipment weight does not necessarily answer whether weight was concentrated beyond a component's capacity. Conversely, a bowed floor does not establish that this particular shipment caused it. Prior damage, wear, equipment condition, and alternative causes may require technical evaluation.

Bills of lading, rate confirmations, broker-carrier agreements, and equipment-use agreements may address different responsibilities. A shipper load and count notation is relevant evidence—not an automatic liability determination. Review the actual language and the parties' roles.

The Carmack Amendment addresses loss or injury to goods received for transportation.⁵ Damage to the carrier's own transportation equipment is a different issue. Do not assume every container or trailer falls outside Carmack: its role and the transaction matter, including whether the item itself was received for transportation.

A broker's arrangement of transportation alone does not establish responsibility for loading damage. Montgomery v. Caribe Transport II, LLC addressed the federal safety exception in a negligent-hiring claim arising from a highway collision. It did not establish broker liability for overloading or decide the merits of negligence.⁶

CACI No. 3903J generally measures physical property damage by the lesser of reasonable repair cost or reduction in value; it does not promise new-equipment replacement cost. Where repair costs plus residual diminished value are appropriate, the instruction's applicable qualifications and cap—the property's pre-damage value—remain important.⁷

CACI No. 3903M measures loss of use by the reasonable rental value of comparable equipment for the period reasonably necessary to repair or replace it.⁸ Document the equipment's availability, the repair timeline, and comparable rental information.

Lost profits require causation and reasonable certainty under CACI No. 3903N, accounting for relevant expenses.⁹ Gross revenue is not automatically lost profit. Avoid overlapping compensation for the same loss, including duplication between downtime-related recovery and lost-profit calculations.

Review contractual notice requirements and applicable filing deadlines promptly; no single deadline fits every claim. To discuss a commercial equipment-damage dispute, contact Mahrouyan Law, P.C., or read about our property-damage practice.

This article provides general information and is not legal advice. Liability and available remedies depend on the facts, contracts, and applicable law. Contacting Mahrouyan Law, P.C. does not by itself create an attorney-client relationship.