Rotomat carousel shelves are characterised by modular structure and because of that are easy to expand. Vertical movement of a shelf on a flattened ellipse is the basis of unit operation. Shelves are always in vertical position, similarly to gondolas.
There is no defined direction of shelf movement: it depends on the fact whether a given shelf will be closer to the operator when it moves up or down. This allows to shorten time required for access to a given document. Every single shelf is designed for a given type of stored documents. A carousel shelf may be adjusted to storage of files with various sizes: A5 or A4 and also to various types of file binders, suspended or free-standing folders or documents stored in boxes.