As a standard transportation tool, the maximum weight of freight shipping boxes is first and foremost determined by their own body weight. Each container clearly indicates its maximum weight on its body: MAXWEIGHTXXXXKGS, TAREWEIGHT: ZZZZKGS. Subtracting the latter from the former yields the maximum load weight of the container. Some containers have their weight limits directly labeled on their doors as PAYLOAD: SSSSKGS.
This is the maximum strength that the freight shipping boxes can withstand. If the cargo exceeds this limit, it may cause deformation of the container body, detachment of the bottom plate, bending of the top beam, and other damages; the person responsible for loading the cargo must bear all losses. Currently, most professional container terminals are equipped with automatic scales, so if the cargo exceeds the weight limit of the container body, the terminal will refuse to accept the container. Therefore, it is recommended that everyone carefully read the weight limit indicated on the container body before loading to avoid unnecessary return and reloading operations.
The old system of ordinary dry cargo boxes includes the 20' GP and 40' GP, with weight restrictions of 21.5 tons and 26 tons, respectively. They are suitable for heavy goods and light goods. However, with the popularization of container shipping, more and more goods that were originally not suitable for container transportation are also being shipped by container ships, which puts higher demands on the strength and weight capacity of freight shipping boxes.
The dry freight container is an important transportation tool for cargo transportation, but the current situation is that the container itself is not fully loaded, and the actual utilization rate of the container is low.
Currently, the transportation situation of containers is as follows: a 20-foot container has a volume of 33m3, but is generally loaded with only 25m3, with a utilization rate of about 75%; a 40-foot container has a volume of 67m3, but is generally loaded with only 55m3, with a utilization rate of about 82%.
Establishing a new design concept for packaging boxes suitable for dry freight container: When a certain type of container is selected as a transport tool, the transport space has already been determined. When the packaging method of a certain type of cargo is determined, the volume of the packaging box should also be roughly determined. How can we determine the maximum load capacity of a freight shipping box? We believe that two conditions must be met:
The packaging box should be loaded with as many goods as possible.
The freight shipping boxes should be loaded with as many packaging boxes as possible.
In order to achieve these two goals, we have designed and manufactured patented measuring tools - three-dimensional calipers, which create a relatively sealed condition for measuring the goods. The goods are fully enclosed and subject to certain compression, so the true volume of the goods in the box can be measured.
By changing the stacking method of the goods, we can measure the true volume of several different shapes, add the relevant packaging thickness, and obtain different packaging box volumes. We can then calculate the number of boxes that can be loaded into the container, and determine the suitable container shape for loading. At the same time, we can also make adjustments to the shape as needed to improve the container's design.
There are many commodities shipped using the dry freight container, and container shipping fees are high. If we can attach importance to the packaging and transportation of each batch of goods, we can save a considerable amount of transportation costs. If this technology is promoted nationwide, and all enterprises in the country, regardless of which factory produces and processes the products or where the container is loaded, can fully utilize the freight shipping boxes, the transportation costs saved each year could reach millions of dollars.