It determines the depth of shelving.

HOOK SHELVING
The interlocking shelving is suitable for archiving or setting up warehouses. It is versatile and robust; it can be assembled in multiple combinations ensuring the biggest flexibility. It doesn’t need specific tools and bolts for the assembly. The basic configuration requires the use of: uprights, crosspieces, unified shelves, hooks and feet. Using the connecting bracket, the shelving supports the storage box. The uprights determine the height, the cross-pieces the depth.