Attic shelves shelf shelves multilayer structure, improve warehouse space utilization, suitable for storing small artificial picking quantity and variety of goods. Bottom shelf is not only a place of material storage loft-style shelves, but the superstructure bearing support beam (column) can be designed to multi-floor (usually 2-3 layers), with stairs, handrails and upgrade cargo elevators. Attic shelves for higher warehouse, light goods, manual access, storage volume is large, but also for technical transformation of existing old warehouse, warehouse space can be increased by the rate of the body. Its load-bearing beams span the bottom if reduced, the construction cost can be greatly reduced.