Reefer Drayage for Cold Chain Importers

Reefer drayage is the short-haul movement of refrigerated ocean containers between port or rail terminals and cold storage, processors, or distribution centers. Unlike dry drayage, a reefer move is a live cold chain — the container is plugged into shore power at the terminal, has to stay powered during the move, and gets plugged in again at the consignee. A power gap of even a few hours on sensitive cargo can reject the entire load.

BlackBridge Logistics handles refrigerated container drayage out of Port Newark, Oakland, Savannah, Charleston, Port Everglades, and other major US reefer gateways. This guide covers how reefer drayage actually works operationally — plug-in requirements at the terminal, genset options for power-out runs, temperature recording and chain of custody, the commodities that move in reefers, and the ports where reefer volume is concentrated.

What is reefer drayage?

A reefer container is a 20- or 40-foot intermodal container with a built-in refrigeration unit on one end. The unit needs either shore power (typically 440V 3-phase at the terminal and at warehouses) or a genset (generator set) clipped to the chassis during over-the-road movement. Temperature setpoints range from +70°F for chocolate to -20°F or lower for deep-frozen seafood and pharma.

Drayage itself is the short leg — terminal to warehouse, warehouse to rail ramp, or port to transload. For refrigerated freight, that short leg becomes operationally heavier because the cargo needs uninterrupted power and the driver needs to verify setpoints are holding. See our main drayage service page for the full container movement picture.

Plug-in requirements at the terminal

Reefer containers are stored at dedicated reefer racks with shore power at every major US port. Each terminal has finite plug capacity, and free time on reefer boxes is shorter than dry — often 2-3 days vs 4-5 on dry. After free time expires, per diem and plug-in charges both start running, and they stack fast. Reefer per diem plus plug-in fees together can run $150-300 per day at typical market rates.

The dispatcher’s job on a reefer move is to pull the container before free time expires, confirm the setpoint and actual temperature when unplugging, and get it to the consignee (or onto a genset) fast enough to avoid a temperature drift. Pre-pull strategy — paying a day of extra storage to pull early — is often cheaper than risking demurrage or a late delivery.

Gensets for power-out runs

During the drive itself, the container gets power from a genset. There are three common configurations:

• Clip-on genset — Mounted to the front of the container, rented from the terminal or a genset provider. Most common for long drays (50+ miles) or multi-leg moves.
• Undermount genset — Built onto the chassis, always available. Carriers with undermount chassis charge a premium but eliminate the rental transaction.
• No genset (short direct) — On short moves under 1-2 hours, some shippers accept the temperature drift and skip the genset. Only appropriate for non-sensitive loads, never for pharma or high-value produce.

Typical market range for genset rental plus fuel is $75-150 per day depending on port and provider. That’s a contextual reference to set expectations — not a BBL quote. Actual pricing depends on terminal, duration, and availability.

Temperature recording and chain of custody

Every reefer unit records temperature continuously on an internal data logger. The record is downloadable at delivery as a PDF or CSV — it’s the document that settles claims when a consignee rejects a load. Modern reefer units (Carrier, Thermo King, Daikin) also support real-time telematics via satellite, so the cargo owner or broker can watch setpoint, return air temp, and supply air temp remotely.

For FDA-regulated pharma, the chain of custody is stricter. FSMA rules require documented temperature control during transport, and many pharma shippers require external data loggers placed inside the container at origin as a redundant record. The drayman’s responsibility is to confirm and document the setpoint and actual temp at pull, during any layovers, and at delivery.

Common reefer commodities

• Produce — berries, citrus, grapes, bananas, avocados, leafy greens. Oakland handles the largest West Coast produce volume inbound and outbound.
• Seafood — frozen shrimp, salmon, tuna. Port Everglades and Savannah handle heavy seafood imports; Seattle-Tacoma handles Pacific seafood.
• Meat and poultry — bulk frozen beef and pork exports through Oakland, Savannah, and Houston.
• Dairy — cheese, butter, UHT milk.
• Pharma — vaccines, biologics, temperature-sensitive drugs. Strict validated cold chain.
• Chocolate and confectionery — +60-65°F setpoints, usually small volume but high value.

Specific ports where reefer volume matters

Oakland is the largest US West Coast reefer export gateway, heavy in produce, meat, and wine. Reefer plug capacity is high but constrained at peak. See our Oakland drayage page.

Port Everglades / Miami is the primary East Coast produce and seafood import gateway, especially from South America and the Caribbean. Free time on reefers is tight. See our Port Everglades drayage page.

Savannah moves large reefer volume both ways — poultry exports and frozen seafood imports. Ocean carrier schedules drive reefer rack congestion seasonally. Charleston and Houston also see meaningful reefer volumes tied to specific trade lanes.

Weight considerations

A loaded 40′ reefer is heavier than a dry 40′ by roughly 8,000-10,000 pounds because of the refrigeration unit and insulation. That eats into payload and pushes reefer drays toward tri-axle chassis and overweight permits more often. Gross combination weight limits in New Jersey, New York, and California are the usual pinch points — your dispatcher needs to check axle weights at booking, not at the scale.

Get a reefer drayage quote

BlackBridge Logistics handles refrigerated container drayage at Oakland, Port Everglades, Savannah, Charleston, Port Newark, Houston, and Seattle-Tacoma. Our team manages pre-pulls, genset rentals, temperature documentation, and reefer-specific per diem tracking. Call (516) 252-3395 or request a quote through our drayage service page.