Gravity racking also called live racking, it's high density and low energy consumption storage system.The pallet is supported by steel rollers. The pallets slide down from entrance side to exit side along the sloping roller conveyer. The brake installed in the roller system can control palle's sliding speed. The safety separator can separate the first pallt from the following one at the exit side so that forkift can easily take away the palles. By this way,first-in-fist-out working mode can be realised. Due to this working mode, gravity rack is widely used in many industries which have requirement on guarantee period, such as food, pharmacy, beverage, chemistry and so on.