Container Unloading and Devanning Services

What container unloading services include

Container unloading services, also called devanning or destuffing, take cargo out of an ocean container and prepare it for its next step: storage, transloading, cross-docking or delivery. A complete unload includes verifying the seal, counting pieces against the packing list, documenting any overage, shortage or damage, and returning the empty container before detention charges grow.

The labor involved depends almost entirely on how the container was packed at origin. A palletized container can be emptied by forklift quickly. A floor-loaded container, with cartons stacked directly on the floor from nose to doors, has to be unloaded carton by carton and usually palletized before it can go anywhere else.

Container devanning by load type

Three load types account for nearly all dry-container imports. Each has a different labor profile and a different set of risks.

How a container unload works, step by step

1. 01
   Pre-arrival planning

   The warehouse reviews the packing list for carton count, SKU count, weights and any sort requirements, then plans crew size, pallets, wrap and dock time. Unloads go faster and cost less when this happens before the container arrives.

2. 02
   Seal check and door opening

   The seal number is checked against the bill of lading and recorded. Doors are opened carefully, since cargo can shift in transit and fall when the doors swing. Photos of the load face are taken before anything is moved.

3. 03
   Unloading and tally

   Cartons or pallets come off and are counted by SKU or PO. Damaged cartons are set aside and photographed. Floor-loaded freight is stacked onto pallets in a stable pattern, usually one SKU per pallet unless the receiver allows mixed pallets.

4. 04
   Exception reporting

   Any overage, shortage or damage is recorded on an OS&D report and sent to the customer the same day. Fast reporting matters because claims against the ocean carrier or supplier depend on timely notice.

5. 05
   Palletizing, wrap and labels

   Pallets are wrapped and labeled for the next receiver. If a retailer or fulfillment center has a routing guide, labels, pallet height and pallet type follow it.

6. 06
   Empty return

   The empty container is swept and returned to the terminal or depot the ocean carrier designates. The return closes the detention (per diem) clock, so it should happen as soon as the unload is done.

Floor-loaded container unloading: why it takes more work

Floor-loaded container unloading is the most common request on trans-Pacific imports because shippers pack cartons floor to ceiling to fit more product into the box. A 40' container that might hold about 20 single-stacked pallets can hold far more product when cartons are stacked loose.

That density saves ocean freight but moves the cost to the unload. Every carton is handled by hand, often twice: once off the container wall and once onto a pallet. Mixed SKUs make it slower because cartons have to be separated as they come off.

Example (illustrative): a 40' container holds 1,600 cartons across 4 SKUs, stacked by SKU from the nose to the doors. A crew can build pallets as it works because each section is one SKU. The same 1,600 cartons spread across 40 SKUs and randomly mixed means every carton has to be read and staged by SKU, which can easily double the labor and the floor space needed.

Equipment used in container devanning

The right equipment depends on load type. Ask a provider what it uses for your freight before you book.

How container unloading is priced

Providers use one of three pricing models. Knowing which one applies helps you compare quotes on equal terms.

Factors that change the labor and the price

• Carton count and weight. Heavy cartons slow a hand unload, raise injury risk and may need two people per carton.
• SKU count and mixing. More SKUs mean more sorting and more pallets; mixed tiers are slower still.
• Sort requirements. Sorting by PO, store or destination adds staging space and verification.
• Receiver specs. Pallet type, maximum height, label placement and carton orientation rules all add steps.
• Cargo condition. Collapsed tiers, wet cartons or shifted loads require extra care and documentation.
• Container size. A 40' container holds roughly twice the cubic capacity of a 20'; see shipping container sizes for capacities.

Should you unload near the port or at your own DC?

Container devanning can happen at a port-adjacent facility or at the final warehouse. The decision usually comes down to weight, destination and timing.

Weight limits and why they affect where you unload

Federal limits on the Interstate system cap a truck at 80,000 lb gross vehicle weight, 20,000 lb on a single axle and 34,000 lb on a tandem axle group (23 CFR 658.17). A heavily loaded container on a tractor and chassis can reach those limits even though the container itself is rated for more.

Triaxle chassis spread a heavy container's weight across three axles to help with axle limits, but the gross limit still applies. When a container is too heavy for the long road leg, unloading it near the port and reloading the freight into domestic trailers at legal weights is often the practical answer.

What a good OS&D report contains

The exception report is the document that protects you when a container does not match its paperwork. A useful one includes:

• Container and seal numbers, with a note on whether the seal was intact and matched the bill of lading
• Photos of the load face when the doors were opened, before any cargo was moved
• Expected vs. actual counts by SKU or PO, with overages and shortages listed separately
• Damage detail: which cartons, what kind of damage, and whether contents appear affected
• Load condition notes such as shifted tiers, missing bracing, wet floor or odor
• Date and time of unloading, so the report can be matched to carrier and supplier notice deadlines

Ask suppliers to load for a faster container destuffing

Much of the cost of container destuffing is decided at origin. These loading instructions to suppliers cost little and save hours at destination:

• Load in SKU blocks, nose to doors, instead of mixing SKUs within a tier.
• Mark every carton on two sides with SKU, PO and carton count in large print.
• Send a load plan showing which SKUs are where in the container.
• Put the heaviest cartons on the bottom and keep crushable cartons on top.
• Use bracing or airbags at the doors so the load face does not collapse when the doors open.
• Palletize when the economics allow. If ocean cost per unit rises only slightly, the savings at destination can outweigh it.

What to send before booking an unload

• Packing list with carton count, SKU count, carton weights and dimensions
• Load type: floor-loaded, palletized, slip-sheeted or mixed
• Sort instructions: by SKU, PO, store, destination or none
• Receiver requirements: routing guide, pallet type, height limit, label format
• Next step: storage, transload, cross-dock or delivery, with destinations
• Container details: container number, size, last free day and empty return instructions

Common container unloading mistakes

• No packing list until the container arrives. Without it, crews and pallets cannot be planned and the container waits.
• Mixed SKUs with unreadable marks. Ask suppliers for large, legible SKU and PO marks on two sides of every carton.
• Skipping photos at the door. Without photos of the load face and seal, damage claims are hard to support.
• Holding the empty. Every day an empty sits after unloading can add detention; return it as soon as it is swept.
• Treating the receiver's routing guide as optional. Retailers and fulfillment centers charge back or refuse freight that does not match their spec.

Detention, per diem and the empty return

Detention, often called per diem, is what the ocean carrier charges when a container stays out of the terminal past its free days. Since May 28, 2024, the Federal Maritime Commission's billing rule at 46 CFR Part 541 requires carriers to invoice demurrage and detention within 30 days of when the charge was last incurred and gives billed parties 30 days to dispute.

The rule makes invoices easier to check, but it does not stop the clock. The fastest way to limit detention is a quick unload and an immediate empty return. For more on how these charges work, see demurrage and detention and last free day.

Where we provide container unloading services

We unload 20' and 40' containers at our Long Beach operation near the Port of Long Beach and Port of Los Angeles, pulling them with our own trucks and company-owned chassis, including triaxle chassis for heavier boxes. Our warehouse management system and barcoding record counts and exceptions as the freight comes off.

See container unloading in Long Beach and container unloading for Los Angeles imports. Unloaded freight can go into warehousing, onward by full truckload, or through our container freight station if it needs to be split by consignee.

Frequently asked questions