 Double Deep Racking SystemDouble-Deep racking systems are comprised of two selective racks placed one behind the other. It simple eliminates some of the aisles and converts it to storage space. Depth of storage is two pallets, and a special kind of fork lift name deep-reach fork lift truck is needed to handle a pallet in the rear slot. Four pallets, two on each side, are accessible from the same aisle. It is desirable to store the same item in both the front and the rear slot to avoid double handling. However, different storage levels can be use to store different items. This rack design is ideal if you have product which you need separated for individual and immediate picking. Loads do not need to be stackable, and may be of varying heights and widths.
Advantages -Up to 50% floor utilization -Good throughput speed -Save cost -Each pallets supported -Less equipment damage Disadvantages -Special type of forklift (deep-reach lift truck) is needed and results in incurring additional cost -Less desirable for multiples of different items stored -Speed of order picking and put-away is made less desirable Applications Ideal when multiples quantities of each product are stored.
High Bay Racking System
 Modern high density warehouses may have storage racks up to the height of 30 M to 35 M with aisles between them only 1.3m wide. This is known as high bay racking system. The pallet movement is dependent on the stacker cranes, thus giving free access to all pallet locations. In addition, it requires special arrangements for tolerances in manufacturing and erection. Perfect positioning and leveling are vital for such installation. The cranes are running on a floor mounted rail and stabilised at the top of the mast by a top guide rail. Furthermore, the pallets can be placed "single deep" or "double deep". The design of the racking system is primarily based on the stacker crane criteria and the structural calculations. Advantage
-Excellent space utilization
-Allows full automation Disadvantage
-Lack of flexibility for subsequent change
-Expensive to build
-Require careful planning when building the storage system
-Require expensive material handling equipment (Stacker crane)
Application
It is suitable for company that wants to go full automation or the company requires a high space utilization rate both air and floor space. |
