OOG (Out of Gauge)
Last updated: June 14, 2026
- OOG cargo exceeds standard container internal dimensions — length > 12m, width > 2.35m, or height > 2.39m
- OOG requires specialized containers (flat racks, open tops) and a lashing plan prepared by an engineer
- Total OOG surcharges typically add 30-100% to base ocean freight depending on dimensions and weight
OOG (Out of Gauge) is cargo that exceeds standard container internal dimensions — length > 12m, width > 2.35m, or height > 2.39m for a 40ft GP container. OOG cargo requires specialized equipment such as flat rack or open-top containers, a lashing plan prepared by an engineer, and specialized handling at ports.
Chinese: 超限货物 / 超规货物 (Chāo xiàn huòwù / Chāo guī huòwù)
How OOG Shipments Work
Unlike standard containerized cargo where the container itself provides protection and a uniform handling unit, OOG cargo requires individual engineering attention for each shipment. Before booking, the forwarder prepares a technical package: cargo dimensions and weight, a proposed lashing plan showing how the cargo will be secured to the flat rack or open-top container, and photos or drawings of the cargo. The carrier's stowage planner reviews this package and either approves the booking or requests modifications.
At the port, OOG cargo requires specialized handling — larger cranes, different stowage positions on the vessel (typically on deck or in the top tier), and careful weight distribution planning. All of this adds cost and preparation time compared to standard FCL shipping.
Practical Example
A Shandong-based manufacturer exports a 5-ton industrial boiler measuring 3.5m x 2.8m x 2.6m to Dubai. The width (2.8m) exceeds standard container width (2.35m), making this OOG cargo. Great Hensen arranges a 40ft flat rack container. Our engineering team prepares a lashing plan specifying 8 lashing points with grade 80 chains and turnbuckles. The boiler is loaded at Qingdao Qianwan Terminal using a heavy-lift mobile crane. The flat rack is stowed on deck for direct crane access at Jebel Ali. Total freight cost: $4,800 versus $2,200 for a standard 40ft container.
Related Terms
- Flat Rack — the primary container type used for OOG cargo
- Breakbulk — individually loaded cargo, often OOG
- RO-RO — alternative shipping method for wheeled OOG cargo
Frequently Asked Questions
How do I know if my cargo is OOG?
Cargo is OOG if any dimension exceeds standard container internal dimensions: length > 12.0m, width > 2.35m, or height > 2.39m for a 40ft GP container. Even if your cargo itself fits, if packaging or securing protrudes beyond these limits, it is OOG. We measure against the specific container type — open-top containers and flat racks have different internal limits.
What extra costs are involved with OOG shipping?
OOG surcharges include: special equipment surcharge (flat rack/open-top), OOG handling surcharge at both terminals, lashing/securing charges, possible crane surcharge for heavy OOG pieces, and stowage planning fees. Total OOG surcharges typically add 30-100% to base ocean freight. Contact us for an OOG/heavy-lift quote.
How are OOG shipments secured on a vessel?
OOG cargo on flat racks or open-top containers is secured with lashing chains, turnbuckles, and straps connected to lashing points on the container. A lashing plan is prepared by an engineer before loading, specifying lashing points, chain specifications, and tension values. The lashing must withstand vessel motion at sea — inadequate lashing can cause catastrophic cargo shift and damage.
Need Logistics Help?
We handle OOG and heavy-lift cargo weekly from Qingdao. Engineering team prepares lashing plans in-house.
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