OOG (Open-Top Container & Special Container)

Open-top containers are suitable for loading oversized cargo that is too tall to be vertically loaded through the door of a standard container. The core applicable scenarios and loading requirements are as follows:

1. Core loading objects for open-top containersOversized cargo: such as large machinery, complete sets of equipment, tall tanks, steel structural parts, etc., whose height exceeds the vertical limit of standard containers (usually around 2.6 meters). Long cargo that can be loaded at an angle: some cargo that is slightly longer but has a prominent height can be fixed by bundling through the top opening of the open-top container. Large cargo that is inconvenient to be disassembled: cargo with irregular shapes that cannot be disassembled and cannot enter through the door of a standard container (such as large molds, artworks, heavy equipment components).

II. Key Precautions for LoadingThere is no enclosed structure on the top, so the goods need to be covered with a waterproof tarpaulin to prevent them from getting wet due to rain during transportation. The goods need to be lifted into the container from the top by a crane. After loading, they must be fixed to the securing points at the bottom of the cabinet using steel wire ropes and fasteners to avoid displacement during transportation. It is necessary to calculate the height and weight of the goods in advance and match them with the load-bearing limit of the open-top container (common container types are 20-40 feet in size, with a load capacity of approximately 20-30 tons).

Split lifting

Split lifting is a commonly used loading/unloading method in OOG (Out of Gauge) cargo transportation. The core is to split oversize and overweight integral goods, and then lift them into or out of special containers (open-top containers, flat rack containers) in batches using equipment such as cranes. The specific points are as follows:

I. Core Application Scenarios of Split Hoisting

Overall dimensions/weight of goods exceeding container type limits: For example, large-scale equipment, ultra-long steel structures, which cannot be entirely loaded into a single container or exceed the lifting capacity of cranes. Goods with detachable structures: After disassembly, their performance is not affected, and the disassembled parts are easy to fix and transport individually (such as complete production lines, large mechanical components). Transport route restrictions: The lifting equipment capacity of some road sections or ports is insufficient, requiring disassembly to reduce the weight/size of individual parts.

II. Key Operation Points

Technical confirmation is required before splitting: clarify the splitting nodes, component weights/sizes to avoid damaging the core structure of the goods. Batch hoisting and fixing: Arrange the hoisting sequence reasonably according to the weight of the components. After each component is individually hoisted into the container, it is independently fixed with lashing points and reinforcement parts to prevent collision during transportation. Cooperation with container type selection: For ultra-high components after splitting, open-top containers can be selected (for top hoisting); for ultra-long/ultra-wide components, flat rack containers can be selected (for side or top hoisting, without side panel restrictions). Proper marking and protection: Mark the split components with numbers, and wrap vulnerable parts with protective materials to avoid wear during hoisting and transportation.

Packing & lashing reinforcement

一、Strict Standards for Loading, Unloading and Lifting Tools

Tool selection matching goods: Select cranes (with a tonnage redundancy of more than 20% reserved) and lifting tools (steel wire ropes, slings, suction cups, etc.) according to the weight and shape of the goods. Overloading is prohibited.

Tool inspection requirements: Before lifting, the wear condition of the tools must be checked. For example, the wire rope's broken wire rate must not exceed the standard, the lifting belt must be free from damage and aging, and regular calibration must be passed.

Lifting operation specifications: Use the balanced lifting method to avoid tilting of goods caused by single-point force; the lifting points must correspond to the stress center of the goods, and it is strictly forbidden to hit the cabinet or the core components of the goods.

二、Selection and usage standards for binding materials

Material selection requirements: Prioritize the use of high-strength steel wire ropes, galvanized strapping, wooden/steel supports, which must comply with international maritime lashing standards (such as the IMO CSS rules).      

Requirements for binding strength: The binding force must be able to withstand the impact forces from ship bump and vehicle braking during transportation. Each fixed point must be reinforced at least doubly, and anti-slip blocks and stop blocks should be added to key parts.

Prohibition of inferior materials: The use of aging, broken, or underweight binding materials is strictly prohibited, and the material specifications must match the weight of the goods (for example, heavy equipment requires steel wire ropes with a diameter of ≥16mm).       

三、Core Operational Specifications for Packing and Reinforcement

Preparation before packing: Check the matching degree between the size and weight of the goods and the container type, clean up the debris inside the container, and lay anti-slip pads (such as rubber pads, wooden pads).

Requirements for cargo positioning: The center of gravity of the cargo must be aligned with the center of the cabinet, with a deviation not exceeding 5% of the cabinet length; the protruding parts of overlong/overwide cargo must be properly protected to avoid scratches during transportation.

Reinforcement details specification: Supports must be tightly attached to the goods and the container walls without leaving gaps; strapping belts/steel wire ropes must be tightened, and protective sleeves (such as rubber tubes) should be added at the contact points with the goods to prevent abrasion to the surface of the goods.

Trailer customs declaration