Classification based on shelf structure

　　According to its structure, shelves can be divided into the following two types:

　　(1) Combined detachable storage rack;

　　(2) Fixed storage shelves are divided into unit storage shelves and through storage shelves.

　　8) Classification by shelf height

　　According to its height, shelves can be divided into the following three types:

　　(1) Low level shelves with a height of less than 5m;

　　(2) Middle shelf with a height of 5-15 meters;

　　(3) High rise shelves with a height exceeding 15m.

　　9) Classification based on storage rack weight

　　According to its weight, shelves can be divided into the following three types:

　　(1) Heavy duty shelves with a storage capacity of over 500 kilograms per layer;

　　(2) Medium sized shelves, each with a carrying capacity of 150-500 kilograms;

　　(3) Lightweight shelves, each with a carrying capacity of less than 150 kilograms

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