First-line collection-the most commonly used books are generally collected, borrowed and read in one, which can be read directly or borrowed.

Second-tier books-books with low utilization rate, such as reference books and reference books, are generally read indoors and cannot be borrowed.

Third-line library-books with extremely low utilization rate are generally stored in dense stacks because there are not many readers. This kind of stack is called dense stack.

Installation of dense stacks: firstly, parallel tracks are placed in the areas where bookshelves need to be installed in stacks, and then bookshelves are continuously placed on the tracks in the direction perpendicular to the tracks, which can increase the collection per unit area by 1.5-2 times. Manually or electrically move bookshelves to create channels for readers to take books.

introduce

Compared with open-shelf stacks, dense shelves are mainly used to collect books. If the focus of open-shelf stacks is "use", then the focus of closed-shelf stacks is "hiding".

Compact shelves are densely stored and have a large capacity, which is suitable for storing books with relatively low utilization rate, but still have certain preservation and utilization value or data value. A medium-sized dense stack with 1 0,000 square meters can store about 400,000 to 500,000 ordinary books, while the same open-shelf stack with collection, borrowing and reading can only store less than10,000 books.