The size of the library elevator is 4700 mm wide, 5550 mm deep and 2500 mm elevator door. There are three common specifications of library book ladders: two-step book ladder, three-step book ladder and four-step book ladder. Specifications are: 700*400*490mm, 1000*400*650mm, 1300*420*800mm respectively. It can be seen that the three-step book ladder has a moderate height and the highest frequency of use. In addition, you may also see other specifications of book ladders, which are basically specially designed by manufacturers when customizing steel bookshelves and compact bookshelves. Library book ladders can be customized if necessary, but the number should reach more than 50.