When you book power only trucking, you keep the trailer and hire the tractor. That split is operationally efficient—and it creates a paperwork gap many shippers notice only after a yard scrape, a blown tire on someone else’s policy language, or a carrier that arrives without trailer interchange coverage.

Power only trailer interchange insurance is not a buzzword for “extra cargo.” It is the commercial cover (and the written agreement behind it) that addresses physical damage to your trailer while it is in a motor carrier’s care. Federal liability filings protect the public; they do not automatically rebuild your van or flatbed.

This guide is for private fleets, DC managers, and 3PLs who stage shipper-owned equipment and need clear ask-lists before Logi Transports LLC (MC-1636889, USDOT 4230991) tenders a hook. Start from the Power Only Truck hub when you need nationwide tractor capacity for trailers you already control.

Why power only creates an insurance question FTL does not

In a classic full truckload booking, the carrier usually supplies both tractor and trailer. Damage to that carrier-owned deck is largely their asset problem. In power only, the deck is yours: branding, telematics, pool ID, and residual value sit on your books while a third-party power unit couples to the kingpin.

That is true whether the trailer is loaded, empty for an empty trailer move, or cycling through a drop and hook exchange. Custody of the trailer—not freight weight—is what triggers interchange risk.

Brokers arrange capacity; they do not replace the carrier’s insurance file. Logi Transports LLC coordinates power units for shipper-controlled trailers. The motor carrier that hooks your equipment still needs the right liability filings and the contractual physical-damage path you require for the trailer itself.

What federal rules actually require (and what they do not)

Two different federal threads get mixed in phone calls. Keep them separate.

1) Public liability / financial responsibility

FMCSA sets minimum levels of financial responsibility for for-hire motor carriers under 49 CFR Part 387. For most for-hire property carriers operating vehicles with GVWR of 10,001 pounds or more hauling non-hazardous property, the baseline BIPD (bodily injury and property damage) filing level is $750,000. Higher limits apply for certain hazardous materials. Brokers of property have a separate bonding/trust requirement (currently framed around a $75,000 surety/trust filing under the Part 387 broker rules), which is not trailer physical-damage insurance.

See FMCSA’s official overview of insurance filing requirements. Those filings protect the traveling public and demonstrate authority readiness. They do not, by themselves, pay to repair a scraped corner post on your private-fleet van.

2) Written equipment interchange

When authorized for-hire carriers interchange equipment, 49 CFR § 376.31 requires a written contract, lease, or other arrangement that specifically describes the equipment, the points of interchange, how the equipment will be used, and the compensation for that use. The agreement must be signed by the parties or their authorized representatives. Cornell’s LII text of 49 CFR § 376.31 is a stable public reference for that rule.

FMCSA does not publish a federal mandate that every power-only hook carry a specific trailer-interchange (TI) dollar limit on a COI. In practice, shippers, equipment pools, ports, and rail facilities require TI (or equivalent) by contract. Your leverage is the tender and the interchange packet—not waiting for a one-size federal TI form.

Trailer interchange agreement vs “we’ll be careful”

A trailer interchange agreement (TIA) is the written handoff that says which trailer is released, where responsibility begins and ends, how the equipment may be used, and who pays for what when metal meets reality. Industry explainers (including FreightWaves Checkpoint coverage of trailer interchange insurance) note the same pattern: the agreement shifts physical-damage responsibility for the trailer while it is in the receiving carrier’s control, and facilities often refuse release without a matching certificate of insurance.

For shippers running private pools, a workable TIA packet usually includes:

• Trailer ID, type, length, and plate / VIN references you care about
• Origin and destination interchange points (yard, dock, customer site)
• Permitted use (loaded haul, empty relocate, drop-and-hook cycle)
• Inspection / condition notes at release and return
• Who pays for tires, roadside, and accident damage while in possession
• Required insurance endorsements and minimum limits

If your team only sends a rate confirmation with a city pair and no equipment terms, you have priced the miles—not the custody of the asset. Pair the rate confirmation with interchange language before the tractor is dispatched, not after a claim email.

Trailer interchange insurance vs non-owned trailer coverage

Carriers and agents use two related products. Names vary by insurer; the operational difference matters more than the brochure title.

Intermodal and many facility access programs (including Uniform Intermodal Interchange and Facilities Access Agreement environments) are famous for requiring trailer interchange coverage with stated minimums. Even if your power only lane never touches a rail ramp, borrow the discipline: match the product to the agreement. Buying “some trailer cover” without a qualifying written interchange can leave a claim argument at the worst moment.

Cargo insurance, when present, protects freight. Your empty reposition still needs a trailer-damage path. Your sealed outbound still needs both cargo logic and trailer physical-damage logic if the box is yours.

What shippers should require before the hook

Use this as a pre-tender checklist alongside our broader shipper checklist and how to get a power only quote walkthrough.

1. Name the asset clearly. Trailer number, type (dry van / flatbed / specialty), loaded vs empty, and any genset or special height notes.
2. Require a written interchange path. Either your standard TIA or carrier paperwork that meets § 376.31-style clarity on equipment, points, use, and compensation.
3. Ask for a COI that matches the agreement. Primary auto liability at or above your company minimum (many shippers ask above the federal floor), plus trailer interchange or non-owned trailer physical damage at a limit that reflects trailer replacement cost—not a token number.
4. Confirm additional insured / loss payee language if your risk team requires it for owned equipment.
5. Document condition at hook and drop. Photos of corners, doors, landing gear, tires, and seal numbers beat “it was fine when we left.”
6. Align drop-and-hook instructions. Wrong-hook risk is an operations failure that also becomes an insurance dispute—see drop and hook for exchange hygiene.

If you are still deciding whether power only or carrier-supplied trailer FTL fits the lane, read power only vs full truckload. Insurance complexity is one reason some shippers keep FTL for one-off freight and reserve power only for controlled pools.

Bobtail myths vs trailer custody (do not conflate them)

Dispatchers sometimes say a driver will “bobtail in, then pull.” Bobtail is tractor-alone positioning. Until the fifth wheel locks on your kingpin, trailer interchange risk has not started—but your ETA clock may have. Once hooked, you are in power only custody territory whether the box is full or hollow. For language clarity, see our earlier Guide on bobtail vs power only.

Empty does not mean uninsured. An empty trailer move still puts a high-value asset on the road. FHWA’s overview of the commercial vehicle size and weight program is a useful federal reminder that combination length and network rules still apply when you relocate empties near state thresholds—even with no freight weight on the bill of lading.

Practical scenarios

Scenario A — Staged sealed vans, drop-and-hook DC
You need cycling power, not a carrier van pool. Require TI-style cover that contemplates detached trailers in the yard, plus crisp trailer IDs for each exchange.

Scenario B — Flatbed deck relocating between job sites
Open-deck damage patterns differ (stake pockets, winches, deck gouges). Set a TI limit that reflects deck replacement cost and insist on condition photos at both ends. Equipment notes on trailer relocation programs still apply.

Scenario C — One-off plant overflow using a shipper trailer
Even a single pull deserves written custody terms. If your legal team will not execute a full TIA for one move, at least get rate-con language plus COI evidence of non-owned trailer physical damage and a signed condition report.

What Logi Transports LLC needs from you

To arrange power only capacity cleanly, send:

• Trailer readiness and interchange expectations up front
• Any mandatory COI limits or endorsement wording your risk team uses
• Yard contacts who can complete inspections without delaying the driver
• Whether the move is live unload, drop-and-hook, or yard-to-yard relocate

We broker nationwide power only from Sebastian, Florida—matching shipper-controlled dry van and flatbed equipment with vetted power units. We do not invent coverage that is not on a carrier’s file, and we will not treat a bobtail arrival as a completed trailer pull.

Bottom line

Power only trailer interchange insurance sits at the intersection of three truths:

• Federal BIPD filings are necessary but not sufficient for your owned trailer.
• Written interchange terms (§ 376.31 discipline) make custody and compensation explicit.
• TI / non-owned trailer products must match how you actually drop, park, and exchange equipment.

Require the agreement and the certificate before the hook—then run the lane like any other timed power only move.

Ready to pull a shipper-owned trailer with clear insurance expectations? Request a quote via Logi Transports LLC at the quote request form, call (864) 791-5644, or email quotes@logitransports.com. Browse services from the Power Only Truck homepage or the power only trucking overview when you plan the next wave of hooks.