Heavy shelves are actually with separator and pillar of two important parts, and also by the cross beam, brace, brace and self-locking bolt, this will prevent bolt looseness shelf failure caused by unstable after the damage;And beam parts it is adopted the special cold rolling P type closed beam;And the beam structure it has light weight, low cost, simple, reliable, and the characteristics of the bearing capacity is strong;Card in column and column equipped with a specially designed safety when the connection between the pins, it is can ensure beam it under the impact of the external force will not fall off;However, it is the layer board adopted internationally do strip layer board, make it change simple, strong bearing capacity, and the characteristics of wear resistance and low maintenance cost.