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OOG(Out Of Gauge) is a short name for all oversized containers or non-standard containers, mainly including :open-top container,flat rack container(or frame container),
reffer container,dress hanger container and tank container.

Sohologistics carry out the heavy cargo transportation plan for project logistics according to Open top container and flat rack container

Open Top Container((known as OT for short)is one type of OOG.

As the name implies, the top of this kind of container is open,which can be divided into two types of hard OT and soft OT due to different top materials.

Hard OT have the non-detachable steel roof on the top while the soft OT have some removable beams and collapsible canvas on the top,

OT fit for transporting relatively high heavy cargos.

According to different shipping liners,the cargos with no more than 4m height are acceptable.

Flat Rack Container, often referred to as frame container or FR container.

The frame container is based on the standard container removed with top roof and side wallboards.  

While sometimes the end wallboard is also removed,there is only remaining bottom plate and 4 corner columns, we call it the flat rack container.

The FR containers play an important role in non-standard containers transportation with its thick bottom plate in order to achieve the load capacity. It mainly carries cargos of over-length, over-wideth, over-height super large machinery or equipment or heavy cargos.

According to the different ship liners standards, the cargos with no more than 4.5m width, 4m height big cargos is acceptable. And for the length, It should be within 15m according to cargo weight. Besides,pay attention that the over-length cargos cannot block container lifting point on both ends lifting point ( lifting point distance between 2.08m) 

The cargos need do waterproof and moistureproof when loading on the container if necessary since the flat rack container generally lay on the top levels of container vessels which are not sealed.

Internal dimensions
Door opening
Door opening
LengthWidthHeightWidthHeightWidthHeightMax grossTareMax payload

Sohologistics have a long-term strategic cooperation with many famous liners like MSK,ZIM, YML, CSCL, WHL, KMTC and CMA in the world. SHL have advantages in the prompt professional operation of quotation and serve every customer with kindness.

The annual export&import volume of OOG operation is more than 800pcs which covers the global base seaports. SHL also have services for container booking, customs declaration, interior loading, supervision, consolidation and binding, trailer, overseas clearance, door to door one-stop logistics solutions for heavy cargo engineering projects.

OOG binding and reinforcement principle

1.The principle of effective binding and reinforcement between the cargo and the container is to prevent the cargo from capsizing to both sides of the frame container or sliding to both ends (baffle) during the hoisting and sailing process to avoid any damages of the cargos.

2.It is prohibited to erect one end of the baffle (Rack) of the frame container while put the other end down. Both ends of the baffle must be erected or put down at the same time.

3.The cargos should be evenly arranged on the wooden floor of the frame container according to the weight. Do not lay more stress on one end. Binding and wedges should be used to prevent the cargos from capsizing and sliding longitudinally on both sides.
Lower the center of gravity of the heavy cargos if the center of gravity is relatively high.

4.Sleepers are necessary between the cargos and the floor of the frame container to increase the friction coefficient. Supports should be filled between the cargos and the baffles at both ends of the frame container to prevent longitudinal movement.

5.It’s prohibited to cover the four Corner Casting parts of the frame container by the cargos or reinforcement , that is, the Lifting Points;The gap between the cargos and the baffle of the frame container should keep at least 30cm, and the binding and reinforcement shall be standard, otherwise the wharf machinery may not hoist these heavy cargos.

6.The load of each reinforcing points on both sides of the frame container is usually 5 tons.
Binding should be avoided to concentrate on one of the reinforcement points.

7.It is prohibited to use iron nails to drive the sleepers or the wooden wedges into the wooden floor of the frame container, so as to avoid damage to the frame container and reduce its loading capacity.

8.The lashing wire rope or nylon lashing belt must be kept in a completely tight condition, the wire rope must be equipped with a turnbuckle fastener and the nylon lashing belt must be equipped with an anti-reverse ratchet.

9.The protective pads should be used for the interface between the wire rope or nylon binding belt and  the cargos. They are usually made of plastic materials (paperboard is not allowed to use). For the cargos like steel coil, the interface between the perforated steel wire rope and the cargos shall be covered with plastic rubber hose as the protective pads.

10.The flat rack container, including when the baffles inverted at both ends of the frame, it can only be stowed on the vessel deck in principle according to the international practice as the lifting point (that is, the corner casting) is obstructed by the cellguide on the vessel.

20´Collapsible Flat Racks

40´Collapsible Flat Racks

Restrictions of Flat Racks

20´Open Top Container

40´Open Top Container

Specification of Open Tops