Introduction to bookshelf classification
Bookshelves in libraries can be divided into metal bookshelves and wooden bookshelves according to materials. Metal bookshelves can be subdivided into single-column bookshelves, multi-column bookshelves, stacked bookshelves, compact shelves and sliding bookshelves.
Single row type
The so-called single-column bookcase means that both sides bear the weight of books on each partition horizontally with single-column metal plates. Each bookshelf is 90cm long and can be used alone or placed continuously. Generally speaking, the height of the bookshelf is more than 200cm, and the top will be connected with tie rods to ensure safety.
Composite column type
Refers to the two sides of the bookshelf, each with more than two columns, which bear the load of books transferred by horizontal partitions. However, in order to enhance the appearance, the sides and top of the metal multi-column bookshelf are pasted with wooden boards.
Stacked bookshelf: In order to make full use of the limited space of the library to store a large number of books, it is a good method to provide books for the bookshelf by using the strong and durable characteristics of steel materials. However, different countries have their own bookshelf specifications. For example, laminated bookshelves in the United States have a clear height of 2280mm on each floor, and each floor is divided into 5-7 sections. In European countries such as Britain, the clear height of each floor is 2250mm, the width of one partition is 200mm, and the width of columns is 50 mm..
Sliding dense bookshelf
Using the guide rail to slide the dense shelf can be divided into two forms: manual and electric. The books are fixed, and the middle bookshelf is guided by the base guide rail to slide, which is one of the methods to effectively use limited space to store a large number of books.
Wooden bookshelf materials, including solid wood, plywood, wood core board, particleboard, etc. , are processed and combined, coated with paint or affixed with surface decoration materials, rich in soft texture. The common form of library is vertical and oblique L-shaped bookshelf, which is convenient for readers to consult books and has different specifications.
Compact stack
Dense bookshelves were designed by Swiss Hans Ingold in the early 20th century. After nearly a century of development and evolution, the use of dense shelves is more and more extensive, and today there are two different forms. One is a movable bookshelf made of metal, which is characterized in that the axial direction (longitudinal direction) of the bookshelf is perpendicular to the track direction. The other is made of wood, and the axial direction of the bookshelf is parallel to the track direction. Many audio-visual rooms in domestic libraries use it to store audio-visual materials.
The most important and obvious feature of dense bookshelves is to save space for books. The front and rear bookshelves are closely placed together, and then the bookshelves are moved through the track, which saves the aisle space in front of and behind the bookshelves and can place more books and materials in a limited space. Because of the close proximity between bookshelves, it has also become a place where books can be properly protected; In addition, it also increases the convenience of use and management.
But dense bookshelves also have some disadvantages. First, the cost is too high. Unless there is a relatively generous budget, it is not easy to fully equip facilities with dense bookshelves (such as lighting and control facilities). Second, the safety of bookshelves, including general use and earthquake safety. Due to the improvement of technology, the dense rack is changed from the previous mechanical operation to the electric operation, and it is very safe for users to operate according to the steps. However, the security of dense bookshelves (books and people) is always difficult to fully grasp during the earthquake, and they are still vulnerable when the earthquake comes.