Platform racking usually uses medium-type shelf or heavy shelf-type racking as the support of the main body and the floor panels.  Floor panels usually select the cold-rolled steel slab, the pattern of steel slab or steel grating floor. But recent years，it is popular to use cold-rolled steel slab. This steel slab has lots of advantages, such as strong load-bearing capacity, good overall performance, high accuracy, smooth surface and easy to control etc.