"Ten million container terminal as an example, to talk about the very vivid and easy to understand the "box space" of those things. Before saying "box space", let's look at a small problem. Below with a formula to explain the berth utilisation rate and berth occupancy rate, although to help you pick out the key points, but there are still diligent and studious friends are not satisfied, asked: this "berthing gap coefficient" is what is the meaning of?
Here is an example:
Like your home community underground car park, the general width of the parking space are wider than the car some, in order to empty the necessary space between the car and the car, in order to facilitate your car at any time in and out of the parking space is not scratched to the neighbouring vehicles.
Car park rows of parking spaces are equivalent to our berths (see below), the car in the parking space is equivalent to berthing operations of the container ship, and this "berthing gap coefficient" is to reserve space for ships to enter and exit the berth and set up, generally for a fixed value of 1.1.
Because this gap occupation is a necessary condition for ship berthing operations, so in the calculation of berth utilisation and occupancy must be added to it. Now that you look back at that formula above, isn't it better understood?
Do you know exactly how many boxes are in the Great Northern 3 yard? I'll give you a few numbers:
The area of the Great Northern Three Yard is 1,837,000 square metres, with a capacity to stack 230,000 TEUs of containers, and a perennial stacking capacity of around 150,000 TEUs. If these boxes are lined up head to tail you drive on the top of the box, you have to drive for about 9 hours! So many building blocks as the container can be so neat, because there is a set of coding system to make these boxes "settled".
It can also be said that, in the container terminal yard, each box has a belong to their own ID, which is the "box position".
Our controllers and gantry crane drivers rely on this "ID", in order to accurately locate a box in the thousands of boxes in the pile, and command and lifting.
If you still feel like you don't understand, then I will help you to put the elephant in the refrigerator in 5 steps, watch out~!
The first step, the whole yard, according to the "district" division
According to the order of berths, each berth corresponds to a district. Such as berth 1 corresponds to 1 zone, berth 2 corresponds to 2 zone ......
In the second step, each zone is divided into "blocks".
Such as District 5, in accordance with the order of the sea side to the land side, respectively, 5-1, 5-2, ......, if the number to the 10th block is not finished, then use 5-A, 5-B, ......
The third step, each piece is divided into "Bay".
The English word is BAY, which corresponds to the BAY of the ship's box space. By convention, odd numbers are used to indicate the placement of small 20-foot boxes, and even numbers are used to indicate the placement of large 40-foot boxes.
The fourth step, each bay is divided into "columns".
There are generally 6 columns for each bay, 1, 2, 3, 4, 5 and 6 from the side near the driveway.
The fifth step, each column is divided into "layers".
English for "TIER", generally 4-5 layers, from the bottom up, in order of 1, 2, 3, 4 ......
Well, so the five steps together, you can easily say a container box. Do you know why some boxes are stacked tightly seamlessly one by one like this?
And why some of them have an empty seam?
It's simple, generally speaking, the ones that are tightly packed next to each other are empty boxes; the ones that are left stacked with a seam are heavy boxes."
