Generally, a box of glass or a bag of glass does not exceed 3 tons, of course, there are 4 tons, because the lifting capacity of the crane is at most 5 tons, and it is impossible to exceed 5 tons;
6mm glass, for example: generally about 20 pieces of coated glass, 30-40 pieces of ordinary glass per bag, about 2-4 tons;
Shelves are shelves for glass. If it is the shelf of the original film library, 4-5 packs/box of glass can be put on one side at most. If installed on one side of the car, put 3-4 packs/box of glass; There is also the material rack in the glass processing plant, that is to say, in order to cooperate with the circulation in the assembly and production process such as hollow/sandwich, the number of man-made sorties is generally no more than 2 tons; But there may be several rows of glass on the actual shelf.
20 cases = 1 ton, which I don't understand, can only be understood as a small box of glass with only 100 kg;