What is the tonnage of a 40ft container

Proven in heavy seas: how resilient is a sea container?

It is estimated that up to 500 million sea containers are in circulation around the world. Only a comparatively small part of them are used as freight containers in international sea trade. The majority is used elsewhere in almost innumerable uses. Because sea containers score with high weather resistance and high load capacity. After all, they were developed to get your cargo to its destination unharmed even in stormy seas - advantages from which you can also benefit from other uses.

Nobody can say exactly how many sea containers it worldwide gives. Industry experts assume that in the world - almost new to heavily used - up to about half a billion Sea containers can be found. Or maybe it's only 150 million or less. There are no reliable figures.

One thing is certain: only one Fraction actually comes in international ocean freight traffic for use. Here, too, the estimated values ​​vary. But based on the available tonnage at leasing companies and shipping companies are likely to 23 million containers or around 39 million TEU will be in service: a value that is around three to four million unitsincreases - annually.

But the majority the metal boxes will used elsewhere - mostly as weather-resistant and resilient Storage container, often as a living or office container. But that Uses are here hardly any limits. Shop or school, greenhouse or flour mill, fish tank or urban swimming pool: There is apparently hardly anything that cannot be achieved with the help of a sea container. For this purpose, almost new containers are often used, which - transported from the production site in Asia to the place of use elsewhere in the world - are only "old" for a sea voyage. In particular, as a storage container, however, containers are used that you about eight to ten years of life as a freight container already behind you.

Because sea containers have not only owed their global triumphal march to their standardized dimensions and versatility. Other major advantages are theirs high resilience and robustness. They are built so that the transported goods and goods too in the worst weather are optimally protected. Made from special Corten steel, corridors the top layer planned and thus forms an additional surface protection against the effects of the weather.

The Payload varies depending on the container variant. For the standard container sizes TEU (20 feet) and FEU (40 feet), they are around 28.2 tons and around 26.7 tons, respectively, since the gross weight - Empty container weight plus cargo - round 30.5 tons must not exceed. An even distribution of the floor load is also important.

Standard ISO containers are also at least six times, often too Stackable up to nine high. The containers are in their respective positions Cornerstonesthat are connected to each other when stacked. Every single pillar is for maximum load of 60 tons designed. Roof and side walls do not bear any load, so that too pure container frames layered on top of each other can be.

Important:Overloads can not only significant damage to the container cause yourself. Optimized load distribution on a container ship can only be achieved if the total weight is correctly specified. Research indicates that Incorrect loading in connection with incorrectly declared gross weights cause accidents in heavy seas can. So there are international efforts that Sea freight container only shipped with verified gross total weight may be.

Image: -JosephB- CC BY-NC-ND 2.0